Library

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Electronic Resource  (406)
  • Loose Leaf
  • 2010-2014
  • 2000-2004  (406)
  • 1880-1889
  • MRI  (121)
  • apoptosis  (117)
  • Apoptosis  (93)
  • Quality of life  (75)
Material
  • Electronic Resource  (406)
  • Loose Leaf
Years
Year
Keywords
  • 1
    ISSN: 1530-0358
    Keywords: Fecal incontinence ; Quality of life ; Health surveys ; Reproducibility of results ; Outcome assessment (health care)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: This goal of this research was to develop and evaluate the psychometrics of a health-related quality of life scale developed to address issues related specifically to fecal incontinence, the Fecal Incontinence Quality of Life Scale. METHODS: The Fecal Incontinence Quality of Life Scale is composed of a total of 29 items; these items form four scales: Lifestyle (10 items), Coping/Behavior (9 items), Depression/Self-Perception (7 items), and Embarrassment (3 items). RESULTS: Psychometric evaluation of these scales demonstrates that they are both reliable and valid. Each of the scales demonstrate stability over time (test/retest reliability) and have acceptable internal reliability (Cronbach alpha 〉0.70). Validity was assessed using discriminate and convergent techniques. Each of the four scales of the Fecal Incontinence Quality of Life Scale was capable of discriminating between patients with fecal incontinence and patients with other gastrointestinal problems. To evaluate convergent validity, the correlation of the scales in the Fecal Incontinence Quality of Life Scale with selected subscales in the SF-36 was analyzed. The scales in the Fecal Incontinence Quality of Life Scale demonstrated significant correlations with the subscales in the SF-36. CONCLUSIONS: The psychometric evaluation of the Fecal Incontinence Quality of Life Scale showed that this fecal incontinence-specific quality of life measure produces both reliable and valid measurement.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1530-0358
    Keywords: Recurrent rectal cancer ; Cost-effectiveness analysis ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: This study was performed to determine the quality of life and cost-effectiveness of therapeutic options for patients with locally recurrent rectal carcinoma, determined from the perspectives of patients and health care providers. METHODS: We reviewed the records of patients (N=68) with locally recurrent rectal carcinoma evaluated from 1992 through 1995. We constructed a decision-analytic model incorporating outcomes, survival, and costs. Utilities were elicited from convenience samples of health care providers and patients using the standard gamble technique. RESULTS: The median survival for patients undergoing surgical resection (n=40) was 42 months, compared with 16.8 months for patients undergoing diagnostic or palliative surgery (n=16) and 18.3 months for patients treated nonoperatively (n=12;P〈0.005). The mean cost of treatment per patient was $19,283 for the nonoperative group, $45,647 for the diagnostic or palliative surgery group, and $70,878 for the surgical resection group. The diagnostic or palliative surgical strategy was dominated by the nonoperative strategy because the former had greater costs with fewer health benefits. The incremental cost-utility ratio of surgical resection compared with nonoperative management using health care provider utilities was $109,777 per quality-adjusted life year gained; it was reduced to $56,698 using per quality-adjusted life year using mean patient utilities. CONCLUSIONS: Patients with recurrent rectal carcinoma view surgery and morbidity to be less severe than health care providers. Diagnostic or palliative surgery is expensive and affects quality-adjusted survival adversely compared with nonoperative therapy. Surgical resection may be a cost-effective use of resources, particularly when cost-effectiveness is calculated using patient preferences.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. 326-332 
    ISSN: 1530-0358
    Keywords: Laparoscopic surgery ; Aged ; Colorectal surgery ; Morbidity ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The aim of this study was to determine rates of complications and extent of benefits for laparoscopic-assisted colectomy compared with open colectomy in patients older than age 75. METHODS: Forty-two patients undergoing laparoscopic-assisted colectomy (1992–1998) were matched to 42 open colectomy patients for gender, age, year of surgery, operating surgeon, and procedure. Health status (American Society of Anesthesiology score), previous abdominal surgery, conversion rate, surgical outcome, and need for assistance at admission and dismissal (independencevs. home with assistancevs. nursing facilities) were reviewed. RESULTS: Mean ages were 81.2 and 80.5 years for laparoscopic-assisted colectomy and open colectomy, respectively (P=not significant). Twenty-one laparoscopic-assisted colectomy and 23 open colectomy patients were females. American Society of Anesthesiology scores were comparable, as were rates of previous abdominal surgery (57 percent for laparoscopic-assisted colectomyvs. 62 percent for open colectomy;P=not significant). Mean operative times were longer for laparoscopic-assisted colectomy (190 minutes for laparoscopic-assisted colectomyvs. 142 minutes for open colectomy;P〈0.001); operating room times progressively decreased from 221 minutes in 1992 to 1995 to 147 in 1998 for laparoscopic right hemicolectomy (P〈0.001). The conversion rate for laparoscopic-assisted colectomy was 14.3 percent. There were no deaths in either group, and laparoscopic-assisted colectomy was associated with fewer morbidities (14.3 percent for laparoscopic-assisted colectomyvs. 33.3 percent for open colectomy;P=0.04), narcotic usage (2.7vs. 4.8 days;P〈0.001), time to return to bowel movements (3.9vs. 5.9 days;P〈0.001), and length of hospital stay (6.5vs. 10.2 days;P〈0.001). Independent status at admission in 37 laparoscopic-assisted colectomy and 38 open colectomy patients was maintained at discharge by 35 laparoscopic-assisted colectomyvs. 29 open colectomy patients (P=0.025). CONCLUSIONS: Laparoscopic-assisted colectomy is safe and beneficial, including preservation of postoperative independence, to the elderly when compared with open colectomy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. 775-781 
    ISSN: 1530-0358
    Keywords: Locally recurrent rectal cancer ; Survival ; Prognostic factor ; Angiogenesis ; Apoptosis ; PCNA labeling index
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: It has recently been demonstrated that the tumor growth rate is a stronger determinant of survival than the extent of the growth in local recurrence of rectal cancer. We studied which factors controlled the tumor growth rate using modern immunohistochemical methods. METHODS: In 51 patients who underwent extended resection for this condition, paraffin-embedded specimens were examined for 1) tumor angiogenesis by CD31 staining and microvessel counting, 2) apoptosis by terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling staining, and 3) cellular proliferative activity using anti-proliferative cell nuclear antigen antibody. The results were compared with carcinoembryonic antigen doubling time and survival. RESULTS: The five-year survival rate was 20 percent. The postoperative carcinoembryonic antigen doubling time, which was the strongest predictor of survival, correlated highly with proliferative cell nuclear antigen labeling index, but did not correlate with the apoptotic index or microvessel counts. CONCLUSION: Our study shows that cancer cell proliferation rather than apoptosis or angiogenesis is a major determinant of tumor growth rate and survival in patients with locally recurrent rectal cancer.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. S23 
    ISSN: 1530-0358
    Keywords: Apoptosis ; Flat-type carcinoma ; Colorectal neoplasms ; p53 ; p21 (WAF1/CIP1) ; Bax
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The aim of this study was to investigate the relationship among apoptotic cell death, proliferative activity, and the expression of apoptosis-regulating proteins (p53, p21 (WAF1/CIP1), and bax) in flat-type early colorectal carcinoma and to compare these factors with those in polypoid-type early colorectal carcinoma. METHODS: Formalin-fixed, paraffin-embedded tissues of 11 flat-type early colorectal carcinomas and 17 polypoid-type early carcinomas were studied. The histologic diagnosis was either well-differentiated adenocarcinoma or carcinoma in adenoma, and the depth of invasion was limited to mucosa or submucosa. Apoptotic cells were detected by terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling method, and proliferative activity was determined by Ki-67 immunohistochemistry using monoclonal antibody MIB-1. Apoptosis-regulating proteins were determined by immunohistochemistry using antibody DO-7 (p53), Cip1 (p21 (WAF1/CIP1)), and Bax (bax). RESULTS: There was no significant difference in terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling index between flat-type early colorectal carcinoma and polypoid-type early carcinoma, at 1.9vs. 1.1, respectively. In flat-type carcinoma terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling index in the p53 protein overexpression group was significantly smaller than that in the p53 protein-negative group (P〈0.05). The Ki-67 labeling index/terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling index ratio in the p53 protein overexpression group was significantly higher than that in the p53 protein-negative group (P〈0.05). In polypoid-type carcinoma, the terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling index and Ki67/terminal deoxynucleotide transferase-mediated deoxyuridine triphosphate-biotin nick end-labeling index ratio showed no significant difference between the p53 protein overexpression group and p53 protein-negative group. CONCLUSION: p53-dependent apoptosis may contribute to the development of flat-type early colorectal carcinoma. Apoptosis and its regulation in flat-type early colorectal carcinoma may differ from those in polypoid-type carcinoma.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Annals of surgical oncology 7 (2000), S. 367-375 
    ISSN: 1534-4681
    Keywords: Outcomes ; Surgical oncology ; Review ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: There have been significant developments and advances in the area of outcomes research in the past 25 years. Unfortunately, many surgical oncologists may not have a clear concept of outcomes research and the methodology involved. Methods: A literature-based review article was done that included an overview of outcomes research, and study design and types, outcome measures, outcome instruments, and sources of outcome data were examined. In addition, we reviewed small area variation(volume outcome analysis as well as quality-of-life studies and their applications in surgical oncology clinical investigation. Specific examples from surgical oncology were identified. Results: As the costs of health care have increased, so has the emphasis on measuring outcomes of medical and surgical care to determine the quality and appropriateness of care. Marked variations in a variety of outcomes after oncological procedures have been attributed to individual surgeon and institution characteristics. Because much of the clinical surgical oncology literature deals only with the traditional mortality and morbidity outcomes, a more comprehensive examination of patient outcomes is required to fully evaluate the impact of patient management decisions. Health-related quality of life can be measured and analyzed in several ways and decisions regarding the use of such methodology are dependent on multiple factors. Conclusions: Surgical oncologists should recognize that the true value of their interventions requires systematic and comprehensive examination of patient outcomes.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1534-4681
    Keywords: Breast cancer ; Quality of life ; Mental health ; Surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: The aim of the present study was to examine whether type of surgery, age, and time since surgery influenced psychological distress and quality of life (QOL) in women treated for breast cancer. Methods: We surveyed 183 women who had undergone surgery for breast cancer. Psychological distress was measured with the Mental Health Inventory and QOL was measured with the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire. Results: After controlling for stage of disease, radiation treatment, and age, there was a statistically significant interaction between type of surgery and time since surgery for the Mental Health Inventory total score, and a marginal interaction between type of surgery and time since surgery for the Global health status/QOL score. Women who had breast conservation surgery experienced significantly greater levels of psychological distress and marginally worse QOL from 40 months after surgery onward than did women who received a mastectomy. Conclusions: The effects of different surgical treatments for breast cancer on psychological distress and QOL become apparent only after a period of several years. Women, therefore, need counseling on the potentially positive and negative psychological implications of different surgical treatments for breast cancer.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. 1497-1502 
    ISSN: 1530-0358
    Keywords: Ulcerative colitis ; Quality of life ; Pelvic pouch ; Dysplasia ; Cancer ; Colitis-associated neoplasia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Despite high patient satisfaction with a pelvic pouch, patients experience some bowel dysfunction. Patients whose indication for surgery is neoplasia may have near-normal preoperative bowel function. We hypothesized that these patients would be less accepting of a poorer functional status after surgery, reflected in a poorer measure of quality of life. METHOD: Sixteen patients who had dysplasia or cancer as the primary indication for surgery were compared with a matched control group whose indication for surgery was failed medical therapy. Quality of life was assessed using one disease-specific instrument, the Inflammatory Bowel Disease Questionnaire, two generic quality-of-life instruments, the Sickness Impact Profile and the Short Form 36, and two utility assessments. RESULTS: The groups were well matched with no significant differences in functional outcome. Quality-of-life scores were high in both groups and there were no significant differences in overall quality of life between the two groups using all five instruments. There was evidence of a response shift phenomenon in the failed medical therapy control group. CONCLUSION: Quality of life of patients who have a pelvic pouch for colitis-associated neoplasia is excellent and the same as that of patients who have a pouch for failure of medical therapy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1530-0358
    Keywords: Anus ; High-grade squamous intraepithelial lesion ; Carcinoma ; Proliferation ; Apoptosis ; Microvessel density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Management of anal high-grade squamous intraepithelial lesions is controversial. Anal and cervical high-grade squamous intraepithelial lesions are similar in that they occur in transitional squamous epithelium, are associated with human papilloma virus infection, and have increased incidence in the immunocompromised population. Ablation of cervical high-grade squamous intraepithelial lesions is preferred, but similar ablation or excision of anal high-grade squamous intraepithelial lesions may compromise bowel control; thus, there is a need to define the malignant potential of anal high-grade squamous intraepithelial lesions. METHODS: We analyzed 50 paraffin sections of normal anoderm, anal low-grade squamous intraepithelial lesions, high-grade squamous intraepithelial lesions, and anal squamous-cell carcinoma. Microvessels were detected immunohistochemically with von Willebrand factor and counted manually along the epithelial-stromal junction. Proliferation and apoptosis were determined in the epithelial cells with MIB-1 antibody immunostaining and the terminal deoxynucleotidyl transferase-mediated digoxigenin-11-dUTP nick end labeling, respectively. RESULTS: Microvascular density was significantly greater in anal high-grade squamous intraepithelial lesions (mean, 0.50 vessels/cm)vs. normal anoderm (mean, 0.21 vessels/cm;P=0.0017, Mann-WhitneyU test). The proliferative percentages were greater in low-grade squamous intraepithelial lesions, high-grade squamous intraepithelial lesions, and squamous-cell carcinoma (mean, 20.4, 21.8, and 23.6 percent)vs. normal anoderm (mean, 14.4 percent), although not significantly (P=0.06, Kruskal-Wallis statistic). Although the mean proliferative proportions were similar in low-grade squamous intraepithelial lesions and high-grade squamous intraepithelial lesions, the apoptotic proportion was lower for high-grade squamous intraepithelial lesions than low-grade squamous intraepithelial lesions (10.13vs. 19.96 percent, respectively;P=NS, Mann-WhitneyU test). CONCLUSIONS: Angiogenesis, increased proliferation, and decreased apoptosis occur in anal high-grade squamous intraepithelial lesions as they do in the cervix before the development of malignancy. These biologic markers support the importance of anal high-grade squamous intraepithelial lesions as a potential premalignant lesion warranting surgical intervention.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1530-0358
    Keywords: Rectal cancer ; Sphincter preservation ; Functional outcome ; Quality of life ; Intraoperative radiation therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Locally advanced primary and recurrent rectal cancers treated with external beam radiation therapy, intraoperative radiation therapy, and chemotherapy represent a complex group of patients in the setting of extensive pelvic surgery and sphincter preservation. We sought to define functional outcome and quality of life in this subset of patients. METHODS: We retrospectively reviewed our experience with locally advanced primary and recurrent rectal cancer patients who underwent intraoperative radiation therapy with either low anterior resection (n=12) or coloanal anastomosis (n=6) between 1991 and 1998. Current functional outcome and quality of life were evaluated by a detailed questionnaire. RESULTS: Median time from operation to assessment was 24 (range, 6–93) months. Using a standardized Sphincter Function Scale, incorporating the number of bowel movements per day and degree of incontinence, patients were graded as poor, fair, good, or excellent function. Of all patients, 56 percent reported unfavorable (poor or fair) function. Of the subset of patients with coloanal anastomosis or very low low anterior resection, 88 percent had unfavorable function as compared with 30 percent with standard low anterior resection. (P=0.02; Fisher's exact probability test). A quality-of-life satisfaction score based on social, professional, and recreational restrictions demonstrated 56 percent of patients to be dissatisfied with their bowel function. CONCLUSIONS: The majority of patients with advanced rectal cancers who require external beam radiation therapy, extensive pelvic surgery, and intraoperative radiation therapy report unfavorable functional and quality-of-life outcomes after sphincter preservation. In this setting patients being considered for coloanal anastomosis or very low anterior resection may be better served by permanent diversion.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. 1206-1212 
    ISSN: 1530-0358
    Keywords: Fistula-in-ano ; Recurrence ; Incontinence ; Quality of life ; Lifestyle ; Satisfaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The surgical treatment of fistula-in-ano frequently results in recurrence of the fistula or postoperative anal incontinence. Despite these problems, most patients are satisfied with the results of their surgery. To clarify this apparent discrepancy, we attempted to identify factors that affect patient's lifestyles and may contribute to their satisfaction. METHODS: A questionnaire was mailed to 624 patients surgically treated for cryptoglandular fistula-in-ano at the University of Minnesota during a five-year period. Three hundred seventy-five patients returned their questionnaires. Patients who were followed up for a minimum of one year were included in this retrospective study. Associations between postoperative complications and patient satisfaction were identified by chi-squared tests and multiple logistic regression. Attributable fractions for patient dissatisfaction were calculated using study population dissatisfaction rates. RESULTS: Patient satisfaction was strongly associated with fistula recurrence, difficulty holding gas, soiling of undergarment, and accidental bowel movements. Effects of incontinence on patient quality of life were also significantly associated with patient satisfaction as was the number of lifestyle activities affected by incontinence. Patients with fistula recurrence reported a higher dissatisfaction rate (61 percent) than did patients with anal incontinence (24 percent), but the attributable fraction of dissatisfaction for incontinence (84 percent) was greater than that for fistula recurrence (33 percent). Patient satisfaction was not significantly associated with age, gender, history of previous fistula surgery, type of fistula, surgical procedure, time since surgery, or operating surgeon. CONCLUSION: Patient satisfaction after surgical treatment for fistula-in-ano is associated with recurrence of the fistula, the development of anal incontinence, and with the effects of anal incontinence on patient lifestyle. In our series of patients treated mainly with laying open of the fistula tract, patients with fistula recurrence had a higher dissatisfaction rate than did patients with anal incontinence. However, because anal incontinence was more prevalent than fistula recurrence, a higher fraction of dissatisfaction was attributable to anal incontinence.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 12
    ISSN: 1530-0358
    Keywords: MRI ; Ischiorectal abscess ; Pelvirectal abscess
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: We evaluated the usefulness of magnetic resonance imaging for the preoperative diagnosis of deep anorectal abscesses. METHODS: Subjects were 21 patients with deep anorectal abscesses. Deep anorectal abscesses were classified into two types, ischiorectal and pelvirectal, according to their location. Patients were also classified into a single abscess group, which showed either an ischiorectal or pelvirectal abscess, and a double abscess group, which showed both ischiorectal and pelvirectal abscesses. The final diagnosis was made from surgical findings, and the types of deep anorectal abscesses determined by digital examination and magnetic resonance imaging were compared. RESULTS: Sensitivity of ischiorectal abscesses (20 lesions) with digital examination and magnetic resonance imaging was 75 and 95 percent, respectively, and that of pelvirectal abscesses (10 lesions) with digital examination and magnetic resonance imaging was 60 and 70 percent, respectively. Sensitivity of the magnetic resonance imaging was significantly higher than that of digital examination in ischiorectal abscesses. Diagnostic accuracy of digital examination and magnetic resonance imaging were both 83 percent in the single abscess group (12 patients), whereas in the double abscess group (9 patients) it was 22 and 78 percent, respectively. The rate of accurate diagnosis of magnetic resonance imaging compared with digital examination in the double abscess group was significantly higher than that in the single abscess group. CONCLUSION: Magnetic resonance imaging was useful for diagnosing and differentiating ischiorectal and pelvirectal abscesses.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Circuits, systems and signal processing 19 (2000), S. 267-278 
    ISSN: 1531-5878
    Keywords: MRI ; spectroscopic imaging ; sample selection ; k-space ; hexagonal sampling ; reconstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Certain types of magnetic resonance imaging (MRI) such as magnetic resonance spectroscopic imaging and three-dimensional (3D) MRI require a great deal of time to acquire the image data. The acquisition time can be reduced if the image has a limited region of support, such as when imaging the brain or a cross section of the chest. Hexagonal sampling of the spatial frequency-domain (k-space) yields a 13.4% sampling density reduction compared to rectangular sampling of thek-space for images with a circular region of support (ROS) without incurring spatial aliasing in the reconstructed image. However, certain nonuniform sampling patterns are more efficient than hexagonal sampling for the same ROS. Sequential backward selection (SBS) has been used in previous work to optimize a nonuniform set ofk-space samples selected from a rectangular grid. To reduce the selection time, we present SBS of samples from a hexagonal grid. A Smith normal decomposition is used to transform the nonrectangular 2D discrete Fourier transform to a standard rectangular 2D fast Fourier transform so that the spatial-domain samples are represented directly on a rectangular grid without interpolation. The hexagonal grid allows the SBS algorithm to begin with a smaller set of candidate samples so that fewer samples have to be eliminated. Simulation results show that a significantly reduced selection time can be achieved with the proposed method in comparison with SBS on a rectangular grid.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 14
    ISSN: 1534-4681
    Keywords: Quality of life ; Cystectomy ; Urinary diversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: In this study, we used a previously well-validated survey to assess the impact of different forms of urinary diversion on overall quality of life in patients with bladder cancer. Methods: A total of 92 patients, having three different forms of urinary diversion after radical cystectomy, completed by mail the SF-36, a validated quality-of-life survey. All patients had local(regional disease at the time of cystectomy and are currently without evidence of disease. Completed surveys were then analyzed into physical (PCS) and mental (MCS) component quality-of-life scores per published protocols. Results were then compared with published age-based norms. Results: A total of 38 men who had cystectomy and ileal neobladder had a mean PCS (6SD) of 48.4 (7.8) and a mean MCS of 51.0 (7.4); 16 men and women who had cystectomy and Indiana Pouch had a mean PCS of 48.4 (8.9) and a mean MCS of 55.7 (3.8). None of these results is statistically different from published age- and sex-based population norms. Thirty-eight men who had cystectomy and ileal conduit had a mean PCS of 41.4 (8.5) and a mean MCS of 48.2 (10.7). The PCS is not statistically different from the population-based norm; however, the MCS is significantly decreased from the published norm (P 5.01). Conclusions: Patients with ileal conduits have significantly decreased mental health quality of life whereas patients with continent urinary diversions do not. Therefore, when not medically contraindicated, patients should be offered a continent diversion as the diversion of choice after cystectomy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. 650-655 
    ISSN: 1530-0358
    Keywords: Loop ileostomy ; Loop colostomy ; Quality of life ; Stoma complications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The hypothesis is that the impact of a temporary stoma on a patient's daily life is determined by complications and related stoma care problems. METHOD: A prospective clinical trial was performed, studying complications and social well-being of 37 patients with loop ileostomy and 39 patients with a loop colostomy (randomly assigned comparison). Patients were categorized according to degree of social restriction. The association between the degree of social restriction and the presence of stoma care problems and complications was assessed. Follow-up was scheduled every three months until the stoma was closed (94 percent). RESULTS: There is no relation between stoma type (ileostomy or colostomy) and degree of social restriction (chi-squared test,P=0.42). The more stoma care problems or complications seen, the higher the degree of social restriction: significantly more stoma care problems were seen in the completely isolated group of patients when compared with the patients who were less socially restricted (Spearman correlation coefficient 1=0.35,P=0.003). Especially stoma leakage, peristomal skin irritation, dietary prescriptions, retraction, and prolapse of the stoma have significant impact on the patient's daily life. CONCLUSION: Stoma surgery has a great influence on a patient's daily life. There is a clear relation between the number of stoma care problems and the degree of social restriction. Follow-up of stoma patients under close surveillance of stoma care nurse to minimize stoma care problems and a careful surgical technique are advocated for good stoma care.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 43 (2000), S. 1227-1236 
    ISSN: 1530-0358
    Keywords: Rectal cancer ; Apoptosis ; p53 ; bcl-2 ; Prognosis ; Recurrence ; Survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The aim of this study was to evaluate the prognostic value of the apoptotic index for recurrence and disease-free survival after curative surgery for rectal cancer, particularly in relation to clinicopathologic variables, p53− and bcl-2 expression. METHODS: Formalin-fixed, paraffin-embedded tissue samples of rectal carcinomas resected curatively within a five-year period were used (N=160). Apoptotic cells with fragmented DNA were detected by the terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphatase-biotin nick-end-labeling method. The ratio of apoptotic tumor cells (in percent) was classified into low apoptotic index (less than 10 percent) and high apoptotic index (10 percent or more). Immunohistochemical analysis was performed using monoclonal antibodies (DO-1 for p53 and clone 124 for bcl-2). Statistics included univariate and multivariate analysis, and survival was calculated using the Kaplan-Meier method. RESULTS: Seventy-five percent of tumors showed a low apoptotic index, and 25 percent had a high apoptotic index. No correlation was found between apoptotic index and International Union Against Cancer stage (P〉0.05). However, significant correlations were documented with histologic differentiation (mean apoptotic index, 5.74 percent in moderatelyvs. 3.98 percent in poorly differentiated carcinomas; P=0.0173), lymph node involvement (mean apoptotic index, 6.11 percent in pN1vs. 3.72 percent in pN2; P=0.0074), p53 status (mean apoptotic index, 6.26 percent in p53−vs. 4.42 percent in p53+; P=0.0085), and bcl-2 expression (mean apoptotic index, 5.13 percent in bcl-2−vs. 6.51 percent in bcl-2+; P=0.0418). Tumors of the lower rectum had a lower apoptotic index than those of the upper rectum (P=0.0277). Neither univariate nor multivariate analysis assessed apoptotic index as predictor of prognosis: Recurrence rates did not differ between tumors related to apoptotic index (22 percent with low apoptotic indexvs. 15 percent with high apoptotic index; P〉0.05), and no significant differences were found regarding survival (P〉0.05). On multivariate analysis, International Union Against Cancer stage (P=0.0002), p53 (P=0.0002), gender (P=0.0136), and bcl-2 (P=0.0243) were independent predictors of recurrence. These variables, except for bcl-2, were also independently related to disease-free survival. CONCLUSIONS: Reflecting tumor biology, apoptotic index as single variable showed no prognostic significance, whereas p53 was an independent predictor for both recurrence and survival, and bcl-2 was independently related to recurrence, but not to survival. Clinically, International Union Against Cancer stage and gender were independent prognostic factors after curative surgery for rectal cancer.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 17
    ISSN: 1534-4681
    Keywords: Gastric cancer ; Apoptosis ; Fas ; Fas ligand ; Cytotoxic T lymphocyte.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Previous studies indicate that gastric carcinomas express Fas ligand and downregulate Fas to escape from the host immune attack; however, the prognostic importance of Fas/FasL expression in this tumor is yet to be evaluated. Methods: Specimens from 87 gastric carcinoma patients of different stages treated in a defined period with curative intent were evaluated for apoptosis, Fas, FasL, and CD8 expression using an immunohistochemical method. Results: The percentage of terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL)-positive apoptotic cells expressed as apoptotic index (AI) was higher in 43 patients when the cut-off value was set at the median value. There were no significant correlations between AI and clinicopathologic parameters. Thirty-nine patients showed a high number of CD81 cells within cancer nests. Positive FasL and Fas expression was seen in 53 and 72 patients, respectively. CD8 and FasL expressions were related only to patients’ age. Fas expression had significant correlations with tumor invasion and Lauren classification. There were significant direct correlations between AI and number of nest CD81 cells and between AI and grade of Fas expression. Apoptotic index, pT stage, CD8 expression, and Fas expression were identified as independent prognostic factors. Conclusions: Spontaneous apoptosis in gastric carcinoma may be an independent prognosticator for survival and is significantly influenced by tumor Fas expression and number of nest CD81 cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 18
    Electronic Resource
    Electronic Resource
    Springer
    Gastric cancer 3 (2000), S. 39-44 
    ISSN: 1436-3305
    Keywords: Key words Chemosensitivity ; Apoptosis ; TUNEL ; Gastric cancer ; Small specimen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. Because chemosensitivity tests usually require a large amount of tissue, they are not used routinely in patients with unresectable gastric cancer. The aim of this study was to investigate whether apoptosis can be used as a sensitivity assay for chemosensitivity in small gastric cancer specimens. Methods. Apoptosis, detected by terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick labeling (TUNEL), was investigated in small specimens of the MKN-1, MKN-45, and TMK-1 human gastric cancer cell lines as a marker of chemosensitivity following exposure to antineoplastic agents. Results. Doxorubicin (DXR), SN-38 (active metabolite of irinotecan), and paclitaxel (Taxol) induced DNA fragmentation in MKN-45 and TMK-1 cells, but not in MKN-1. In contrast, neither 5-fluorouracil (5-FU) nor cisplatin (CDDP) induced DNA fragmentation in any of the three cell lines. Small pieces cut from tumors implanted in nude mice were exposed to the antineoplastic agents in culture medium for 24 h, and the percentage of TUNEL-positive cancer cells (TUNEL positivity) was examined. TUNEL positivity in all three cancers increased after exposure to DXR, SN-38, and Taxol, but not after exposure to CDDP or 5-FU. MKN-45 showed the highest TUNEL positivity with SN-38 and Taxol, and TMK-1 TUNEL positivity was highest with DXR. MKN-45 and TMK-1 were the most sensitive to these three antineoplastic agents in vitro, while MKN-1, with the lowest TUNEL positivity, was the least sensitive to these three antineoplastic agents. TUNEL positivity after exposure to Taxol correlated with the antitumor effects of this compound in an animal model. Conclusion. These results suggest that, in small gastric cancer specimens where apoptosis is implicated, TUNEL positivity may be applicable to a chemosensitivity test.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Trauma und Berufskrankheit 2 (2000), S. 249-254 
    ISSN: 1436-6274
    Keywords: Schlüsselwörter ; Schultergelenk ; Basisdiagnostik ; Röntgendiagnostik ; Sonographie ; Computertomographie ; Kernspintomographie ; Arthrographie ; Keywords ; Shoulder joint ; Basic diagnosis ; X-rays ; Sonography ; Computed tomography ; MRI ; Arthrography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: It is its ball-and-socket anatomy that makes the shoulder joint the most flexible of all human joints. This high degree of freedom of movement means, however, on the one hand that early degenerative damage is likely to occur as a result of sports and occupational strains and on the other that it is particularly vulnerable to injuries. Diagnostic radiology from two different perspectives is the basic diagnostic procedure for unexplained shoulder pain and for shoulder injuries. Dislocating osseous injuries or luxations can be detected most precisely or assessed most reliably during follow-up by this means. Intra-articular findings and alterations to the soft tissues (degenerative, traumatic) can be delineated by sonography, computed tomography and magnetic resonance imaging, albeit with differing degrees of reliability and specificity. Sonography is generally available, but not reliably standardized. Computed tomography is the method of choice for diagnosis of osseous and joint injuries. Over the last 10 years magnetic resonance imaging (MRI) has improved in sensitivity and specificity with technical progress (coils, sequences, reconstruction modalities) and has therefore moved into the focus of clinical interest.
    Notes: Das Schultergelenk ist infolge seiner anatomischen Ausbildung als Kugelgelenk das beweglichste Gelenk des menschlichen Körpers. Die sich hieraus ergebenden Bewegungsmöglichkeiten bedingen einerseits bereits frühzeitig degenerative Schädigungen infolge beruflicher oder sportlicher Belastungen und andererseits eine besondere ¶Angriffsfläche für Verletzungen. Die Basisdiagnostik sowohl des unklaren Schulterschmerzes als auch verletzungsbedingter Schädigungen am Schultergelenk ist die Röntgendiagnostik in 2 Ebenen. Dislozierende ossäre Verletzungen bzw. Luxationen sind hiermit treffsicher nachzuweisen bzw. in der Verlaufskontrolle zu beurteilen. Intraartikuläre Befunde und Weichteilveränderungen (degenerativ, traumatisch) sind hingegen mit den Schnittbildverfahren der Sonographie, Computertomographie und Kernspintomographie mit unterschiedlicher Treffsicherheit und Spezifität nachzuweisen. Die klassische Gelenkarthrographie hingegen tritt gegenüber diesen Verfahren deutlich in ihrer Bedeutung zurück. Die Sonographie ist ein ubiquitär verfügbares, jedoch wenig standardisiertes Verfahren. Die Reproduzierbarkeit der Befunde ist fraglich. Die Computertomographie stellt die Methode der Wahl bei der Diagnostik von okkulten ossären bzw. Gelenkverletzungen dar. Die Methode ist breit verfügbar und mit vertretbarem Aufwand durchzuführen. In den letzten 10 Jahren hat die Kernspintomographie infolge der technischen Weiterentwicklung (Spulen, Sequenzen, Rekonstruktionsmöglichkeiten usw.) an Sensitivität und Spezifität gewonnen. In der Summe aller klinischen Fragestellungen stellt sie neben der Basisdiagnostik derzeit die effektivste Untersuchungsmethode des Schultergelenks dar.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Rechtsmedizin 10 (2000), S. 90-95 
    ISSN: 1434-5196
    Keywords: Schlüsselwörter Geschosse ; Verletzungen ; MRT ; Beurteilung ; Dokumentation ; Keywords Projectiles ; Injuries ; MRI ; Assessment ; Documentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: For the assessment of gunshot injuries, conventional X-ray examination, ultrasound and CT examinations are commonly used imaging techniques. With the exception of some authors, there is agreement that projectiles indicate a contraindication for MRI because of artificial imaging side-effects and the potential of secondary dislocation due to ferromagnetism. MRI testing was carried out on 56 projectiles for ferromagnetism and imaging quality in vitro and in pig carcasses with a 0.2 T and a 1.5T-MRI scanner. The image quality was compared to that of a CT scan. Projectiles with ferromagnetic properties can easily be distinguished from non-ferromagnetic ones by pretesting the motion of an projectile of the same type within the magnetic field of the MR scanner. When ferromagnetic projectiles were excluded, MRI yielded the more precise images compared to other imaging techniques. Projectile localization and associated soft tissue injuries were visualized without artifacts in all cases. When ferromagnetism is excluded MRI gives an excellent imaging procedure for the assessment and documentation of gunshot injuries. Therefore this imaging procedure may be also useful for medico-legal investigations.
    Notes: Zur Beurteilung des Ausmaßes von Schußverletzungen und zur Lokalisationsdiagnostik werden allgemein konventionelle Röntgenübersichtsaufnahmen sowie die Sonographie und die Computertomographie angewendet. Mit Ausnahme weniger Autoren wird generell davon ausgegangen, daß Projektile aufgrund der Generierung von Artefakten in der Bildgebung und der Gefahr einer sekundären Fremdkörperdislokation, bedingt durch den Ferromagnetismus, nicht mit der MRT beurteilt werden dürfen. 56 verschiedene Projektile wurden nach entsprechender Vortestung bezüglich ihrer Ferromagnetizität mit je einem 0,2-T- und 1,5-T-MRT-Gerät in vitro und anschließend in Schweinekadavern untersucht. Die Bildqualität wurde mit denen von CT-Bildern verglichen. Die ferromagnetischen Eigenschaften der Projektile können leicht beurteilt werden, indem man Vergleichsgeschosse desselben Typs in das Magnetfeld des MRT-Gerätes legt. Nach Ausschluß der Ferromagnetizität übertrifft die MRT alle anderen bildgebenden Verfahren. In allen Fällen gelang eine exakte Projektillokalisation sowie eine überlegene Darstellung der Weichteilverletzungen. Aufgrund der Ergebnisse ist die MRT, nach Ausschluß von ferromagnetischen Fremdkörpern, ein exzellentes Verfahren zur Beurteilung und Dokumentation von Schußverletzungen. Abhängig von den Fragestellungen kann dieses bildgebende Verfahren auch in der Rechtsmedizin eingesetzt werden.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 21
    Electronic Resource
    Electronic Resource
    Springer
    Mund-, Kiefer- und Gesichtschirurgie 4 (2000), S. 111-117 
    ISSN: 1434-3940
    Keywords: Schlüsselwörter Kiefergelenkfrakturen ; Kernspintomographie ; Achsiographie ; Diskusmobilität ; Diskusposition ; Key words TMJ fractures ; MRI ; Axiography ; Disc mobility ; Disc position
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Magnetic resonance imaging (MRI) assessment of traumatized temporomandibular joints (TMJ) usually focuses on disc position, defining regular joint function by normal, excentric or displaced disc position. So far, there are only few reports regarding disc position after open reduction of diacapitular or high condylar fractures of the TMJ with dislocation. The aim of the present study was to evaluate the role of the disc as regards postoperative functional outcome by electronic axiographic recordings of condylar movements and MRI, displacement of the disc and lesions of TMJ soft tissues being frequent in this type of mandibular fractures. A total of 30 subjects with 37 condylar fractures in whom osteosynthesis was performed using a preauricular approach were imaged postoperatively (mean 24 months) with a 1.5-Tesla MRI system to determine, (a) the position of the disc, (b) the range of mobility of the disc and (c) condylar mobility in closed and open mouth position, comparing fractured sides (FS) vs nonfractured sides (NFS). Linear movements between the two jaw positions in the sagittal plane were measured by superimposing transparencies. The results indicate: (1) more than 70% of the discs (FS) were found to be in normal position; there was no disc displacement without reduction. However, these data stood in contrast to severe limitations of the axiographic tracings as presented by almost 30% of the subjects. (2) Significant correlations were found between fixed (α = 0.05) or highly immobilized (α = 0.01) discs and axiographic limitations, suggesting disc mobility to be a valuable parameter for assessment of the postoperative functional outcome.
    Notes: Zusammenfassung Bei diakapitulären Frakturen bzw. hohen Kollumluxationsfrakturen mit Beziehung zum Lig. laterale sind Verlagerungen des Diskus häufig und werden nach konservativer Therapie mit einer Häufigkeit zwischen 50 und 100% angegeben. Informationen über die Diskusposition nach operativer Versorgung dieser Frakturgruppen liegen bisher nicht vor. Ziel der vorliegenden Studie war es, die Bedeutung von Position und Mobilität des Diskus für das postoperative funktionelle Ergebnis dieser Frakturgruppen zu klären. Die Objektivierung der operativen Ergebnisse bei 30 Patienten mit 37 über einen präaurikulären Zugang versorgten Gelenkfrakturen erfolgte mittels elektronischer Achsiographie und Kernspintomographie (1,5-T-System), im Mittel 24 Monate postoperativ. Erhoben wurden die Position und der Bewegungsumfang des Diskus bzw. des Kondylus im Seitenvergleich. Die linearen Bewegungen zwischen mundoffener und -geschlossener Position wurden durch Folienüberlagerung korrespondierender sagittaler MRT-Schichten ermittelt. Die Ergebnisse zeigten zum einen, dass 〉 70% der Disci auf der Frakturseite orthotop (Position A) lagen und keine fixierten anterioren Dislokationen (C) auftraten. Die achsiographischen Befunde zeigten in Diskrepanz dazu bei immerhin 30% der versorgten Gelenke höhergradige Limitationen der Exkursionsbahnen. Zum anderen bestehen signifikante Zusammenhänge zwischen fixierten (α = 0,05) bzw. hochgradig immobilisierten (α = 0,01) Disken und achsiographisch erfassten Limitationen der Translationsbewegung. Im Gegensatz zu bisherigen Studien sollten nach der operativen Versorgung von Gelenkfrakturen nicht nur die (statische) Diskusposition, sondern in erster Linie die Diskusmobilität als Parameter für das funktionelle Ergebnis berücksichtigt werden.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 22
    ISSN: 1434-3940
    Keywords: Schlüsselwörter Kiefergelenk-MRT ; Diskusdislokation ; Kiefergelenkhistologie ; Keywords Temporomandibular joint (TMJ) ; MRI ; Anterior disk dislocation ; TMJ histology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Problem. Anterior dislocation of the articular disk of the temporomandibular joint (TMJ) found by MRI tomography often presents a problem. It may persist in MRI despite improvement of articular symptoms and even be found in healthy persons free of any symptoms. Can this be explained by the similarity in structure of the anterior connective tissue of the disk and capsule and their pathological changes? Is a second coronal plane required for MRI investigation? Material and methods. The preauricular regions of 72 patients of the TMJ clinic were examined by oblique-sagittal and oblique-coronal MRI. A Siemens-Vision MRI was used. It was also possible to prepare 10 articular disks of the TMJ with anterior capsular tissue as well as 20 complete TMJs of adults from autopsy material. Sagittal, transversal, and horizontal serial sections were examined histologically. Results. In 49 of the 72 cases examined, an anterior dislocation without reduction found in the sagittal MRI was not confirmed in the oblique-coronal MRI. In the sagittal MRI it was possible to differentiate three, in the coronal MRI six typical forms of magnetic resonance signals, which are represented in figures. They are compared with anatomical and histological connective tissue findings adjacent to the TMJ. The structural similarity of the disk and anterior capsular tissue of the TMJ is demonstrated. The close connection of the disk and connective tissue surrounding the TMJ makes differentiation of MRI findings difficult especially following regressive and adaptive reactions. Conclusions. In MRI, anterior capsular tissue is able to simulate dislocation of the disk. Pathological tissue reactions may alter the MRI signal and lead to the wrong diagnosis of dislocation of the disk. Diagnosis of an anterior disk dislocation cannot be established solely on the basis of oblique-sagittal MRI findings.
    Notes: Zusammenfassung Fragestellung. Der Befund anteriore Diskusdislokation im sagittalen MRT beinhaltet 2 ungeklärte Probleme. Trotz Rückbildung einer Gelenksymptomatik können anteriore Diskusdislokationen im MRT unverändert bestehen, sie wurden sogar bei gesunden Probanden beschrieben. Ist die Ursache in der feingeweblichen Ähnlichkeit der anterioren Diskus- und Kapselbindegewebe und in deren pathologischen Strukturänderungen zu suchen? Kann auf die Befundung in der 2. koronalen Ebene verzichtet werden? Material und Methode. Die präartikulären Regionen im schräg-sagittalen und im schräg-koronalen MRT von 72 Patienten aus der Kiefergelenkspezialsprechstunde wurden befundet. Die Untersuchungen erfolgten mit dem Siemens-Vision-MRT. Bei unselektierten Sektionen konnten 10 Disci articulares mit dem anterioren Kapselgewebe sowie 20 Kiefergelenkpräparate Erwachsener präpariert werden. Sagittale, transversale und horizontale Serienschnitte wurden histologisch untersucht. Ergebnisse. Bei 49 von 72 ausgewählten Fällen gab es für eine anteriore Diskusdislokation ohne Reduktion im sagittalen MRT keine Bestätigung im schräg-koronalen MRT. Es konnten in den sagittalen MRT 3, in den koronalen MRT 6 sich wiederholende Signalformen differenziert werden. Sie sind skizziert. Ihre Zuordnung zu gelenkumgebenden Bindegeweben erfolgte mittels Vergleich dieser Signalformen mit den anatomischen und histologischen Kiefergelenkpräparaten. Die feingewebliche Ähnlichkeit des Discus articularis mit dem anterioren Kapselbindegewebe wird aufgezeigt. Seine enge Verbindung mit den gelenkumgebenden Bindegeweben erschwert die Differenzierung im MRT insbesondere beim Vorliegen regressiver und adaptiver Reaktionen. Schlussfolgerung. Das anteriore Kapselgewebe kann eine Diskusdislokation im MRT vortäuschen. Pathologische Gewebereaktionen ändern das MRT-Signal und tragen dazu bei, falsch-positive Befunde zur Diskusdislokation entstehen zu lassen. Schräg-sagittale MRT sind für die Diagnosefindung „anteriore Diskusdislokation mit und ohne Reposition“ nicht ausreichend.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 23
    ISSN: 1432-2307
    Keywords: Key words Colon ; Nonpolypoid adenoma ; Apoptosis ; Proliferation ; Morphogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Nonpolypoid neoplasms, as well as ordinary polypoid tumours, are occasionally found in the colorectum. To clarify whether cell kinetic status affects the macroscopic morphology of colorectal neoplasms, we investigated proliferative indices (PI), apoptotic indices (AI), and the expression of apoptosis-related gene products. We examined 110 colorectal neoplasms comprised of 36 polypoid, 38 flat elevated and 36 depressed tumours. According to WHO’s criteria these tumours consisted of 61 adenomas with low grade dysplasia (LGD), 30 adenomas with high grade dysplasia (HGD) and 19 carcinomas with submucosal invasion. Apoptotic cells were detected by TUNEL staining. Proliferating cells and apoptosis-related gene products were assessed by immunohistochemistry for Ki-67, p53, Bcl-2, and Bax antigens. AI were closely associated with macroscopic morphology in adenomas but not in carcinomas. PI were relatively constant among the three macroscopic types in adenomas and carcinomas. Median AI values of polypoid, flat elevated and depressed tumours were 1.8%, 2.1% and 4.6% for adenomas with LGD, 0.8%, 2.4% and 6.2% for adenomas with HGD and 2.9%, 4.0% and 3.6% for carcinomas, respectively. Overall PI were significantly higher in carcinomas than in adenomas with LGD, whereas AI were not different. Although the incidence of expression was significantly higher in carcinomas for p53 and in adenomas for Bcl-2 than the others, the expression of apoptosis-related gene products (p53, Bcl-2 and Bax) was similar among polypoid, flat elevated and depressed tumours. Macroscopic morphology of colorectal adenomas is determined by the apoptosis not by proliferation, and high apoptosis found in depressed adenomas implies their low net growth.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 24
    ISSN: 1432-2307
    Keywords: Keywords Medullary thyroid carcinoma ; MEN2 ; Proliferation ; Apoptosis ; bcl ; p53
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  C-cell hyperplasia (CCH) and medullary thyroid carcinoma (MTC) in patients affected by germline mutations of the RET oncogene represent an exceptional opportunity to study the regulation of proliferation and apoptosis during tumour initiation and progression. In 56 specimens [CCH, n=1; MTC with CCH, n=26; MTC, n=20; lymph-node metastasis (LNM), n=9] from 46 patients [multiple endocrine neoplasia type 2a (MEN2a), n=24; MEN2b, n=2; familiar MTC (FMTC), n=4; sporadic MTC, n=16] and 3 cases of non-neoplastic CCH, proliferation activity (MIB1), the rate of apoptosis [dUTP nick end labelling (TUNEL)] and expression of p53, bcl-2, bcl-x and bax were investigated and compared with clinical data. In MEN-associated CCH and small MTC, bcl-2 was strongly expressed, bcl-x was moderately expressed and bax was only weakly expressed. Advanced tumours and LNM did show a more heterogeneous bcl-2 staining accompanied by an increased bax expression and accelerated proliferation. The rate of apoptosis was extremely low in all investigated tumours. P53 was detectable in three patients with rapidly growing and extensively metastasising MTC. No somatic p53 mutations were found. Hereditary MTC with germline RET mutations at codon 918 (MEN2b) and codon 634 revealed a bias towards a higher proliferation activity at a younger age and are more frequently accompanied by LNM. CCH and MTC are characterised with a preponderance of bcl-2 as a factor blocking the programmed cell death. While MTC, in general, is a slowly growing tumour, a minority of tumours do progress rapidly with high proliferation. The factors leading to an accelerated tumour progression do not seem to take their effect via the regulation of apoptosis. Certain alterations of RET are supposed to have a direct or indirect implication on proliferation and, because of this, an effect on the clinical course.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 25
    Electronic Resource
    Electronic Resource
    Springer
    Ethik in der Medizin 12 (2000), S. 139-153 
    ISSN: 1437-1618
    Keywords: Key words: Motion pictures ; Medical ethics ; Physician-patient relationship ; Truth disclosure ; Informed consent ; Third-party consent ; Quality of life ; Euthanasia ; Terminally ill ; Schlüsselwörter: Film ; Medizinethik ; Arzt-Patient Beziehung ; Aufklärung ; Wahrheit sagen ; informed consent ; Lebensqualität ; Sterbehilfe ; Heilversuche
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Philosophy
    Description / Table of Contents: Zusammenfassung. Filme erzählen Geschichten. Spannungsvoll sind dabei vor allem jene Szenen, in denen Menschen vor Entscheidungskonflikte gestellt werden. Medizinethische Konflikte tauchen dabei nicht nur in Arztserien oder Krankheitsdarstellungen auf, sondern häufig in Genres, in denen diese Thematik kaum vermutet wird: Komödien, Western, Liebesfilmen, Gangster- und Kriminalfilmen. Indem Filme derartige Konflikte inszenieren und Lösungen bieten, greifen sie auf moralische Werthaltungen zurück und sind zugleich Seismographen für die gesellschaftliche Relevanz medizinethischer Themenfelder. Allerdings können im Film ethische Prinzipien der Entscheidungsfindung der Dramaturgie der Handlung zum Opfer fallen. Eine Analyse der dargestellten Konfliktsituationen ähnelt einer medizinethischen Fallbesprechung und stellt eine hilfreiche Ergänzung für die Vermittlung analytischer und kommunikativer Kompetenzen dar.
    Notes: Abstract. Movies tell stories. Thrilling are especially those situations, when people have to make ethical decisions. Issues of medical ethics crop up not only in hospital series, but often in genres where this subject is hardly to be supposed: comedies, westerns, love stories and gangster movies. Enacting these conflicts means offering a solution, and in doing so films refer to moral values and – at the same time – function as seismographs for the social relevance of bioethical topics. But it is possible that ethical principles of good decision-making fall victims to the drama of the story. Analysis of the portrayed conflict is similar to a case discussion in bioethics and represents a helpful adjunct to the procurement of analytical and communicative competences.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 26
    ISSN: 1432-1335
    Keywords: Key words Genistein ; Eicosapentaenoic acid ; Apoptosis ; Bax ; Bcl-xL ; Caspase-3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Genistein, a prominent isoflavone in soy products, produced dose- and time-dependent in vitro growth inhibition at high concentrations (at least 185 μM) with an IC50 of 7.0–274.2 μM after 72 h incubation in four breast cancer cell lines (DD-762, Sm-MT, MCF-7 and MDA-MB-231) and one breast epithelial cell line (HBL-100) of human and animal origin; it stimulated estrogen-receptor-positive MCF-7 cells at low concentrations (3.7 nM–37 μM). Genistein-exposed cells underwent apoptosis, confirmed by G2/M arrest followed by the appearance of a sub-G1 fraction in cell-cycle progression, and by a characteristic cell ultrastructure. The apoptosis cascade was due to up-regulation of Bax protein, down-regulation of Bcl-XL protein, and activation of caspase-3. Genistein acted in synergism with eicosapentaenoic acid (EPA), a fish oil component, on human breast cancer MCF-7 cells (genistein 〉 93.2 μM and EPA 〉 210.9 μM) and on MDA-MB-231 cells (genistein 〉 176.1 μM and EPA 〉 609.3 μM). Dietary intake of genistein in combination with EPA may be beneficial for breast cancer control.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 27
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 126 (2000), S. 145-152 
    ISSN: 1432-1335
    Keywords: Key words Angiogenesis ; Apoptosis ; Glioma ; Thymidine phosphorylase ; Vascular endothelial growth factor ; AbbreviationsTP thymidine phosphorylase ; GBM glioblastoma ; AA anaplastic astrocytoma ; LGA low-grade astrocytoma ; VEGF vascular endothelial growth factor ; RT-PCR reverse transcriptase/polymerase chain reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Thymidine phosphorylase (TP) has been implicated as a potent angiogenic factor and a prognostic factor in various human solid tumors. We investigated the expression of TP in a series of human astrocytic tumors using immunohistochemistry, enzyme-linked immunosorbent assay, and reverse transcriptase/polymerase chain reaction (RT-PCR) analysis. A total of 63 astrocytic tumors [27 glioblastomas (GBM), 19 anaplastic astrocytomas (AA), 17 low-grade astrocytomas (LGA)] and 5 normal brain tissues were immunohistochemically stained with antibodies to TP, vascular endothelial growth factor (VEGF), p53, MIB-1, and factor-VIII-related antigen. They were also evaluated for the degree of apoptosis by a ApopTag kit. Ten tumors (5 GBM, 2 AA, 3 LGA) and 3 normal brain tissues were evaluated for their expression of VEGF and TP by RT-PCR analysis. TP was constantly localized in the cytoplasm of astrocytic tumor cells, less intensely in the cytoplasm of vascular endothelial cells, but not in the normal brain. Some of the TP-positive cells were of macrophage origin, but most positive cells were the tumor cells themselves. Vascular density, MIB-1 positivity, p53 positivity, VEGF expression, and the apoptotic index were significantly higher in the TP-positive tumors than in TP-negative tumors. There was a significant correlation between TP and VEGF mRNA expression. In a limited number of glioblastoma cases, the apoptotic index was significantly higher in TP-positive glioblastomas than in TP-negative glioblastomas. In human astrocytic tumors, TP was expressed in the tumor, macrophage, and endothelial cells. TP was a potent angiogenic factor closely associated with cell proliferation and tumor apoptosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 28
    ISSN: 1432-1335
    Keywords: Key words Cycloprodigiosin hydrochloride ; Breast cancer ; Apoptosis ; Intracellular acidification ; Bcl-2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of cycloprodigiosin hydrochloride (cPrG · HCl), a H+/Cl− symporter, on five human breast cancer cell lines (KPL-1, T-47D, MCF-7, MKL-F, and MDA-MB-231), a human breast epithelial cell line (HBL-100), and a human fibroblast cell line (WI-38–40) was examined. cPrG · HCl inhibited the growth of all five breast cancer cell lines (IC50: 0.46–0.62 μM) and slightly inhibited HBL-100 and WI-38–40 cell growth (IC50: 1.75 μM and 2.26 μM respectively). cPrG · HCl treatment in KPL-1 cells increased the pH of acidic organelles, decreased intracellular pH, and caused apoptosis, which was confirmed by the appearance of a sub-G1 population by flow cytometry and DNA fragmentation. In addition, cPrG · HCl-induced apoptosis was strongly suppressed by imidazole, a cell-permeable base, suggesting that intracellular acidification was essential for the apoptosis. Further, cPrG · HCl treatment up-regulated Bax and Bak expression, down-regulated Bcl-2 expression, and activated caspase-3. Therefore, the intracellular acidification by cPrG · HCl treatment suppressed the growth of human breast cancer cell lines by inducing apoptosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 29
    ISSN: 1432-1335
    Keywords: Key words 5-Fluorodeoxyuridine ; Heterodinucleoside dimers ; Prodrugs ; Prostate cancer ; Cytotoxicity ; Cell cycle ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Purpose: Current therapies have limited impact on the progression of metastatic hormone-refractory prostate cancer. Therefore, we investigated the utility of new heterodinucleoside phosphate dimers of 5-fluorodeoxyuridine (5-FdUrd) in p53-mutated and androgen-independent DU-145 human prostate tumour cells. Methods: The effects of the dimers were assessed in vitro by a cell proliferation assay for cytotoxicity, flow cytometry for cell cycle distribution, confocal laser scanning microscopy for the detection of apoptotic bodies, poly(ADP-ribose) polymerase cleavage for caspase 3 activity and by a thymidylate synthetase assay. Results: The new dimers N 4-palmitoyl-2′-deoxycytidylyl-(3′→5′)-5-fluoro-2′-deoxyuridine (dCydPam-P-FdUrd) and 2′-deoxy-5-fluorouridylyl-(3′→5′)-2′-deoxy-5-fluoro-N 4-octadecylcytidine (5-FdUrd-P-FdCydOct) caused marked cytotoxicity with IC50 values of 3–4 μM. 5-FdUrd-P-FdCydOct at 200 μM was capable of eradicating 100% of tumour cells whereas 10% of the cells were resistant to 5-FdUrd. Cytotoxicity was caused by a dramatic S-phase arrest, resulting in an increase of this cell population from 34% to 85% with 5-FdUrd-P-FdCydOct and to 81% with dCydPam-P-FdUrd. S-phase arrest was followed by apoptosis, as shown by 85% of the cells staining positive for Apo 2.7 antibody, a six- to eight-fold increased caspase 3 activity and DNA fragmentation. Thymidylate synthase activity was inhibited by 50% at 0.6–0.7 μM dimer concentration. The dimers were hydrolysed in vitro by phosphodiesterase I and human serum to the corresponding nucleosides and nucleoside monophosphates. Conclusions: The new dimers dCydPam-P-FdUrd and 5-FdUrd-P-FdCydOct are effective prodrugs of 5-FdUrd and have potential value for the treatment of p53-mutated and hormone-independent human prostate carcinomas.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 30
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Gliomatosis cerebri ; MRT-Diagnose ; Enzephalitis ; Key words Gliomatosis cerebri ; MRI ; Diagnosis ; Encephalitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The diagnosis of the rare disease Gliomatosis cerebri requires the correlation of clinical, radiological, and pathological findings. We report on two patients with intravitally diagnosed gliomatosis cerebri. Due to the unusually high malignancy of the tumor cells, diagnosis was complicated by atypical findings such as gadolinium enhancement in MRI and raised intracranial pressure. The clinical course, differential diagnosis, and literature are summarized briefly.
    Notes: Zusammenfassung Die Diagnose der seltenen Gliomatosis cerebri kann nur in Zusammenschau von klinischen, radiologischen und histopathologischen Befunden gestellt werden. Im vorliegenden Artikel berichten wir über 2 Patienten, bei denen intra vitam nach stereotaktischer Hirnbiopsie die Diagnose Gliomatosis cerebri gesichert wurde. Da in beiden Fällen für Gliomatosis cerebri ungewöhnlich hochgradig entdifferenzierte Tumorzellen vorlagen, wurde die Diagnosefindung durch atypische Befunde wie Kontrastmittelaufnahme im MRT und klinische Zeichen der intrakraniellen Drucksteigerung erschwert. Klinischer Verlauf, Differentialdiagnosen und Literatur werden kurz dargestellt.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 31
    ISSN: 1433-0385
    Keywords: Keywords: Inguinal hernia ; Plug-and-patch repair ; Results ; Quality of life ; Geriatric ; Elderly. ; Schlüsselwörter: Leistenhernie ; Plug-und-Patch-Reparation ; Ergebnisse ; Lebensqualität ; geriatrisch ; älter.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. Im Rahmen einer prospektiven Beobachtungsstudie wurden die perioperativen Ergebnisse der Plug-und-Patch-Reparation bei Patienten ≥ 65 Jahre untersucht und zusätzlich bei 34 konsekutiven Patienten die Lebensqualität vor und 3 Monate postoperativ standardisisiert mit Hilfe der Short Form (SF) 36 – einem validierten Lebensqualitätsbogen – erhoben. Von August 1994 bis Februar 1999 wurden 147 Patienten mit einem Durchschnittsalter von 73 ± 5 Jahren (65–92 Jahre) in der Plug-und-Patch-Technik zumeist in Lokalanaesthesie (LA: n = 124; 84 %, ITN: n = 23; 16 %) operiert. Die präoperativen Risikofaktoren waren vor allem Alkoholkonsum, Hypertonus, Diabetes mellitus, coronare Herzerkrankung, Nikotinkonsum, cerebrale Erkrankungen, Hyperlipidämie und pulmonale Erkrankungen. Nach anaesthesiologischer Einschätzung bestand in der Mehrzahl ein Stadium ASA II (ASA I: n = 14; 9 %, ASA II: n = 82; 56 %, ASA III: n = 51; 35 %). Die durchschnittliche Operationszeit betrug 41 ± 17 Min. (26–73). Intraoperative Komplikationen traten nicht auf, postoperative Komplikationen bestanden vor allem in oberflächlichen Wundhämatomen (n = 6; 3,7 %), und -infektionen (n = 1; 0,6 %), Seromen (n = 7; 3,8 %), Harnverhalt (n = 3; 1,8 %) sowie ilioinguinalem Schmerzsyndrom (n = 3; 1,8 %). Der postoperative Schmerzmittelbedarf betrug 4,9 ± 1,8 g Novalgin®über durchschnittlich 4 ± 3 Tage. Die Dauer des postoperativen Klinikaufenthaltes lag bei 2 ± 1 Tagen, die Einschränkung alltäglicher Verrichtungen bei 6 ± 3 Tagen. Bei der klinischen Nachuntersuchung ergab sich in allen Fällen ein regelrechter Befund ohne Hinweis auf ein Rezidiv oder Spätkomplikationen. Bei der Lebensqualität zeigte sich 3 Monate postoperativ eine signifikante Verbesserung (p 〈 0,05) in den Dimensionen: physische Funktion, Schmerz, Vitalität und soziale Funktion im Vergleich zu den präoperativen Werten. Tendentiell günstiger aber nicht signifikant waren postoperativ die Dimensionen Rolleneinschränkung sowie psychische und globale Gesundheit.
    Notes: Abstract. In a prospective study the perioperative results of plug-and-patch repair were investigated in patients ≥ 65 years, and quality of life was assessed using the SF36 preoperatively and 3 months after the procedure in 34 consecutive patients. From August 1994 to February 1999 147 patients with a mean age of 73 ± 5 years (65–92 years) were operated on using the plug-and-patch technique, mostly under local anesthesia (LA: n = 124, 84 %, ITN: n = 23, 16 %). Preoperative risk factors were alcohol consumption, hypertonus, diabetes mellitus, ischemic heart disease, smoking, cerebrovascular disease, hyperlipidaemia and pulmonary disease. Most of the patients were ASA II (ASA I: n = 14, 9 %, ASA II: n = 82, 56 %, ASA III: n = 51, 35 %). No intraoperative complications occurred, postoperative complications consisted of superficial wound hematoma (n = 6, 3.7 %) and infection (n = 1, 0.6 %), seroma (n = 7, 3.8 %), urinary retention (n = 3, 1.8 %) and ilioguinal pain syndrome (n = 3, 3.8 %). The total amount of postoperative analgesic consumption was 4.9 ± 1.8 g Novalgin for about 4 ± 3 days. The duration of postoperative hospitalization was 2 ± 1 days and limitation of daily activities 6 ± 3 days. Clinical examinations after 3 months revealed no recurrence or late complications. Investigation of quality of life showed a significant improvement in the SF36 domains of physical activity, pain, vitality, and social functioning after the operation. No significant change was observed for physical, emotional, and global health.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 32
    Electronic Resource
    Electronic Resource
    Springer
    Der Chirurg 71 (2000), S. 1132-1137 
    ISSN: 1433-0385
    Keywords: Schlüsselwörter: Polytrauma ; Lebensqualität ; demographische Prädikatoren ; therapieabhängige Prädikatoren. ; Keywords: Multiple trauma ; Quality of life ; Demographic factors ; Injury related factors.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract. This study investigated multiple trauma patients, who were injured between 1991 and 1995 and treated in our department. The aim of this study was to identify the determinants of quality of life after multiple trauma. From a total of 186 patients 173 (93 %) were examined. The patients were asked to rate their quality of life according to the Nottingham Health Profile (NHP) and to a visual analogue scale (VAS). The VAS and the NHP isolated the age of the patients, the duration of artificial respiration, and the duration of rehabilitation as the predictors for a reduced overall quality of life. These results show that quality of life after multiple trauma not only depends on the severity of injury but also on demographic and psychosocial factors.
    Notes: Zusammenfassung. Ziel dieser Studie war es, Prädikatoren zu identifizieren, die die erreichbare Lebensqualität polytraumatisierter Patienten nach Abschluß ihrer klinischen und rehabilitativen Therapie determinieren. Es wurden 173 Patienten nachuntersucht, die in den Jahren 1991–1995 ein Polytrauma per definitionem erlitten hatten. Die posttraumatische Lebensqualität der Patienten wurde mit den international etablierten Meßinstrumenten Nottingham Health Profile (NHP) und einer visuellen Analogskala (VAS) bewertet. Über die VAS und den NHP ließen sich global das Alter der Patienten zum Zeitpunkt der Polytraumatisierung, die Beatmungsdauer und die Rehabilitationsdauer als hochsignifikante Determinanten der posttraumatischen Lebensqualität differenzieren. Diese Ergebnisse zeigen, daß die erreichbare Lebensqualität nach Polytrauma nicht nur von der Schwere der Verletzungen, sondern auch von vorbestehenden, therapeutisch nicht zu beeinflussenden demographischen und psychosozialen Daten abhängig ist.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 33
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Morbus Parkinson ; Neuropsychologie ; Psychologische Tests ; Lebensqualität ; Keywords Parkinson's disease ; Neuropsychology ; Psychological tests ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In addition to the motor symptoms of Morbus Parkinson, a number of cognitive and emotional changes take place. The diagnosis of these concomitant symptoms has received increasing attention in research and clinical practice. Global rating scales offer economical advantages but generally do not satisfy the requirements of psychometric criteria, and they do not suffice in light of the multidimensional symptoms of the disease. Based on recent research results, recommendations from the CAPSIT protocol (Core Assessment Program for Surgical Interventional Therapies) for diagnosis of neurosurgically treated Parkinson's patients, and the restraints of everyday clinical work, we propose a standardized neuropsychological diagnostic routine. It includes diagnostic methods that are in use internationally and so timesaving and easily accessible that they can be considered suitable for routine diagnostics. Data comparison among various treatment centers can thus take place more easily. We have included only methods that differentiate well and whose test criteria offer a basis for thorough consultation as well as planning and evaluation of multidimensional therapy.
    Notes: Zusammenfassung Neben den motorischen Symptomen treten beim Morbus Parkinson eine Reihe kognitiver und emotionaler Veränderungen auf. Die Diagnostik dieser Begleitsymptome hat in den letzten Jahren nicht nur im Bereich der Forschung, sondern auch in der klinischen Praxis zunehmend an Bedeutung gewonnen. Globale Ratingskalen genügen trotz ihrer ökonomischen Vorteile in der Regel nicht den Anforderungen psychometrischer Testgütekriterien und werden der Multidimensionalität der Erkrankung nicht gerecht. Basierend auf dem aktuellen Stand der Forschung, den Empfehlungen des CAPSIT-Protokolls zur Diagnostik neurochirurgisch behandelter Parkinsonpatienten sowie den Erfordernissen der klinischen Praxis wird eine Testbatterie zur standardisierten neuropsychologischen Routinediagnostik vorgeschlagen. Sie umfasst diagnostische Verfahren, die zeitökonomisch, gut zugänglich und international verbreitet sind, um in der Routinediagnostik eingesetzt werden zu können und den Austausch zwischen verschiedenen Zentren zu vereinfachen. Es wurden nur Verfahren berücksichtigt, deren Differenziertheit und Testgüte Grundlage für eine fundierte Beratung sein können sowie solche, die für die Planung und Evaluation einer multidimensionalen Therapie geeignet sind.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 34
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Hallervorden-Spatz-Krankheit ; Parkinsonsyndrom ; MRT ; 123J-β-CIT ; 123J-IBZM ; Keywords Hallervorden-Spatz Disease ; Parkinson's syndrome ; MRI ; 123I-β-CIT ; 123I-IBZM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Hallervorden-Spatz disease (HSD), a rare extrapyramidal motor illness, is usually only confirmed after death. In vivo diagnosis has relied hitherto on the combination of typical magnetic resonance imaging (MRI) findings (the “eye of the tiger” sign) and heterogeneous clinical symptoms of movement disorder which have been regarded as almost pathognomonic. We report on the diagnostic contribution of 123J-β-CIT single photon emission computed tomography (SPECT) and 123J-IBZM SPECT in akinetic-rigid Parkinson's syndrome occurring in a case of HSD. In contrast to Parkinson's disease and multisystem atrophies, the results of both tests were normal. This constellation of findings shows that the degeneration lies primarily outside the nigrostriatal system, supporting arguments for the nosologic distinction of HSD from other extrapyramidal illnesses.
    Notes: Zusammenfassung Die Diagnose der Hallervorden-Spatz-Krankheit (HSD), einer seltenen extrapyramidal-motorischen Erkrankung, konnte gewöhnlich erst postmortal gesichert werden. Bislang galt der typische MRT-Befund mit dem “Tigerauge-Zeichen” in Kombination mit der heterogen klinischen Symptomatik von Bewegungsstörungen als nahezu pathognomonisch und diente zur Diagnosestellung zu Lebzeiten. In der vorliegenden Kasuistik soll der diagnostische Beitrag von 123J-β-CIT und 123J-IBZM-SPECT bei einem akinetisch-rigiden Parkinsonsyndrom im Rahmen einer HSD dargestellt werden. Für beide Untersuchungen wurden im Gegensatz zum M. Parkinson und Multisystematrophien Normalbefunde gefunden. Diese Befundkonstellation zeigt einerseits, dass die Degeneration primär außerhalb des nigrostriatalen Systems liegt, und andererseits unterstützt sie die Diskussion der nosologischen Abgrenzung der HSD von anderen extrapyramidalen Erkrankungen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 35
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Multiple Sklerose ; Apoptose ; Immunpathogenese ; CD95 ; TNF ; Keywords Multiple sclerosis ; Apoptosis ; Immunopathogenesis ; CD95 ; TNF
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Apoptosis, or programmed cell death, is a physiological cell suicide program mainly leading to selective elimination of useless cells. This mechanism is important for the homeostasis of the immune system and presumably plays a two-sided role in the pathogenesis of multiple sclerosis (MS). On the one hand, evidence has been provided that impaired apoptosis might result in increased numbers or persistence of activated myelin-specific T cells, thus inducing the pathophysiologic processes in MS. On the other hand, local tissue damage might involve apoptosis of glial and neuronal cells and lead to the clinical symptoms. Here, an overview is presented on the current knowledge of the role of apoptosis in the pathogenesis of MS, and implications for related therapeutic strategies are discussed.
    Notes: Zusammenfassung Apoptose, auch programmierter Zelltod genannt, stellt einen physiologischen Prozess zur selektiven Eliminierung vor allem von unerwünschten körpereigenen Zellen dar. Dieser für die Homöostase des Immunsystems wichtige Mechanismus nimmt wahrscheinlich eine ambivalente Schlüsselrolle in der Ätiopathogenese der multiplen Sklerose (MS) ein. So existieren Hinweise dafür, dass bei der MS eine eingeschränkte Apoptose zur pathologischen Existenz und Persistenz aktivierter myelinspezifischer T-Zellen führt, die wiederum für die charakteristische intrazerebrale Entzündung verantwortlich gemacht werden. Gleichzeitig deuten aktuelle Arbeiten aber darauf hin, dass auf der Endstrecke der entzündlichen Reaktion der apoptotische Untergang von Glia- und evtl. auch Nervenzellen zur Gewebeschädigung und somit entscheidend zur klinischen Symptomatik beitragen. Ziel dieser Übersicht ist die Zusammenstellung der bislang gewonnenen Erkenntnisse zur Bedeutung von Apoptose für die Pathogenese der MS und eines Ausblicks auf mögliche apoptoseorientierte Therapiestrategien.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 36
    Electronic Resource
    Electronic Resource
    Springer
    Der Nervenarzt 71 (2000), S. 91-95 
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Creutzfeldt-Jakob-Krankheit ; Diagnostik ; Diffussionswichtung ; MRT ; Bildgebung ; Übertragbare spongiforme Enzephalopathien ; Key words Creutzfeldt-Jakob disease ; Diagnosis ; Diffusion-weighted image ; MRI ; Brain images ; Transmissible spongiform encephalopathies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Today the diagnosis of Creutzfeldt-Jakob disease (CJD) is proven only postmortem or by evidence of neuropathology. During the patient's lifetime EEG recordings or cerebrospinal fluid analysis may support the diagnosis. In most cases, T2-MRI scans show hyperintensities of the basal ganglia. A new imaging technique called diffusion-weighted MRI (DWI) has recently been established. The sensitivity of DWI was evaluated in five patients suspected of CJD. All five cases showed hyperintense signal changes in the basal ganglia on DWI sequences. These findings were more pronounced in DWI than in T2, FLAIR, or PD-weighted images. Thus, DWI seems to be the most sensitive sequence for detecting changes in patients with suspected CJD. Moreover, its short scanning time ensures that fewer artifacts occur, especially in the case of myoclonus.
    Notes: Zusammenfassung Die sichere Diagnose der Creutzfeldt-Jakob-Krankheit kann nur bioptisch oder autoptisch durch Untersuchung von Hirngewebe gestellt werden. Die klinische Verdachtsdiagnose erhärten können technische und laborchemische Untersuchungen; hierzu gehört neben dem EEG die Surrogatmarkerbestimmung im Liquor. Nachdem sich bei der Mehrzahl der Patienten Veränderungen der Basalganglien gezeigt haben, gehört das MRT zu den bildgebenden Verfahren, die bei Verdacht auf CJD eingesetzt werden können. Inzwischen ist die Diffusionswichtung (DWI) in die neuroradiologische Diagnostik eingeführt worden. DWI-gewichtete MRTs bei 5 CJD-Patienten wurden von uns untersucht. Alle 5 Fälle zeigten im DWI-MRT signalintense Veränderungen der Stammganglien. Diese Veränderungen waren jeweils deutlicher als in der T2, Flair- oder Protonenwichtung. Das DWI-MRT halten wir für sensitiver zum Nachweis kortikaler und basaler Veränderungen bei CJD-Patienten im Vergleich zu Standardsequenzen. Durch die kurze Untersuchungszeit können besonders bei den häufig vorhandenen Myoklonien andere Wichtungen aufgrund von Bewegungsartefakten oftmals nicht in der gewünschten Qualität durchgeführt werden.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 37
    Electronic Resource
    Electronic Resource
    Springer
    Der Unfallchirurg 103 (2000), S. 1079-1085 
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Knie ; MRT ; Arthroskopie ; Meniskus ; Key words Knee ; MRI ; Arthroscopy ; Meniscus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In order to assure diagnostic accuracy, 172 knee joints were examined prospectively by MRI. After MRI, all knee joints were examined by arthroscopy. Tears of the medial meniscus were found in 102 patients, the lateral meniscus showed a tear in 29 cases. Assuming that arthroscopy represents the golden standard of diagnostic measure concerning the knee joint, it can be stated that false-positive MRI findings on the medial and lateral meniscus were diagnosed in three cases and false-negative MRI findings were diagnosed for two knee joints regarding the medial meniscus and four times regarding the lateral meniscus. For the medial meniscus a sensitivity of 98%, a specificity of 96%, an accuracy of 94%, and the positive and negative value of prediction were calculated at 97% each. Regarding the lateral meniscus, a sensitivity of 85%, a specificity of 98%, an accuracy of 92%, a positive predictive value of 88%, and a negative predictive value of 85% were found. Under the prerequisite that the MRI is carried out correctly and assessed by an experienced radiologist, the accuracy of the MRI for meniscus diagnosis is almost equivalent to the one by arthroscopy. Under these conditions, MRI can be recommended when no safe and sufficient clinical diagnosis can be made. The rate of unnecessary arthroscopies with a pure diagnostic purpose can be lowered significantly by means of MRI.
    Notes: Zusammenfassung Zur Überprüfung der diagnostischen Treffsicherheit wurden prospektiv 172 Kniegelenke mittels Magnetresonanztomographie (MRT) untersucht. Nach der MRT erfolgte bei allen Kniegelenken die arthroskopische Überprüfung der bildgebenden Diagnose. Rissbildungen des Innenmeniskus fanden sich bei 102 Patienten, am Außenmeniskus wurde 29-mal ein Riss befundet. Unter der Annahme, dass die Arthroskopie der “golden standard” diagnostischer Maßnahmen am Kniegelenk darstellt, ergab sich, dass falsch-positive MRT-Befunde am Innen- und Außenmeniskus in jeweils 3 Fällen und falsch-negative MRT-Befunde am Innenmenikus bei 2 Kniegelenken und am Außenmeniskus 4-mal erhoben wurden. Für den Innenmeniskus wurde eine Sensitivität von 98%, eine Spezifität von 96%, eine Genauigkeit von 94% und der positive bzw. negative Vorhersagewert mit jeweils 97% errechnet. Bezüglich des Außenmeniskus ließ sich eine Sensitivität von 85%, eine Spezifität von 98%, eine Genauigkeit von 92%, ein positiver Vorhersagewert von 88% und ein negativer Vorhersagewert von 85% ermitteln. Unter der Voraussetzung, dass die MRT korrekt durchgeführt und von einem erfahrenen Radiologen befundet wird, ergibt sich eine annähernd gleichwertige Treffsicherheit der MRT für die Meniskusdiagnostik wie mit der Arthroskopie. Die MRT kann daher unter diesen Voraussetzungen zur Anwendung empfohlen werden, wenn klinisch keine ausreichend sichere Diagnose zu stellen ist. Die Rate unnötiger rein diagnostischer Arthroskopien kann durch die MRT entscheidend gesenkt werden.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 38
    Electronic Resource
    Electronic Resource
    Springer
    Der Urologe 39 (2000), S. 214-221 
    ISSN: 1433-0563
    Keywords: Schlüsselwörter Krebs ; Karzinogenese ; Zellzyklus ; Protoonkogene ; Tumorsupressorgene ; DNA-Reparaturgene ; Apoptose ; Telomere ; Key words Multi-step carcinogenesis ; Cell cycle ; Proto-oncogene ; Tumor suppressor gene ; DNA repair gene ; Apoptosis ; Telomeres
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The development of cancer is one of the most intensively studied areas of medical research resulting in an immense quantity of data. Therefore, the purpose of this article is to give an overview of the basic principles of cancer development. Key words such as multi-step carcinogenesis, cell cycle, proto-oncogene, tumor suppressor gene, DNA repair gene, apoptosis and telomeres are explained and described in examples. This paper aims to connect recent information of molecular and cellular biology in an overview of cancer origin and development.
    Notes: Zusammenfassung Die Entstehung von Tumoren und die Entwicklung von entsprechenden Modellen gehört zu den sehr intensiv untersuchten Fragestellungen medizinischer Forschung mit einer schier unerschöpflichen Datenflut. Ziel dieses Artikels ist daher die möglichst anschauliche und daher sicher vereinfachende Darstellung grundlegender Prinzipien der Krebsentstehung. Es werden Begriffe wie Mehrschrittkarzinogenese, Zellzyklus, Protoonkogene, Tumorsupressorgene, DNA-Reparaturgene, Apoptose und Telomere in Zusammenhang gebracht und anhand von Beispielen erklärt. Dieser Artikel soll damit zum Verständnis der Zusammenhänge der Molekular- und Zellbiologie bei der Krebsentstehung beitragen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 39
    Electronic Resource
    Electronic Resource
    Springer
    Der Urologe 39 (2000), S. 527-529 
    ISSN: 1433-0563
    Keywords: Schlüsselwörter Interstitielle Zystitis ; Epidemiologie ; Inzidenz ; Prävalenz ; Lebensqualität ; Keywords Interstitial cystitis ; Epidemiology ; Incidence ; Prevalence ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Available data on the epidemiology of interstitial cystitis (IC) are heterogeneous. Its prevalence ranges between 16 and 510 females/100,000 inhabitants and the incidence at 1.2–2.6/100,000 females with a mean age of 42–52 years. The disease tends to affect women (female:male ratio 9–10:1) and Caucasians (〉90%). The quality of life of patients suffering from IC is reduced to a significant degree in almost every aspect (work, social events, leisure activities). Financial expenses (medical as well as economical) associated with the disease are considerable. There is an enormous need to promote IC education and research in order to support affected patients effectively in the future.
    Notes: Zusammenfassung Die vorliegenden Daten zur Epidemiologie der interstitiellen Zystitis sind sehr heterogen. Die Prävalenz beträgt 16–510 Frauen/100.000 Einwohner, die Inzidenz liegt zwischen 1,2–2,6 /100.000 Frauen mit einem mittleren Alter bei Diagnosestellung von 42–52 Jahren. Die Geschlechterverteilung bevorzugt das weibliche im Verhältnis zum männlichen Geschlecht (9–10 Frauen/1 Mann) mit einer ethnischen Bevorzugung der Kaukasier (〉90%). Die Lebensqualität der betroffenen Patienten ist in fast allen Lebensbereichen (Arbeit, Soziales, Freizeit) signifikant eingeschränkt. Die Kosten (sowohl medizinisch als auch volkswirtschaftlich) sind erheblich. Es besteht ein enormer Weiterbildungs- und Forschungsbedarf, um durch einen besseren Kenntnisstand den Patient(inn)en mit IC wirkungsvoll helfen zu können.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 40
    Electronic Resource
    Electronic Resource
    Springer
    Der Nervenarzt 71 (2000), S. 411-415 
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Kufs ; Neuronale Zeroidlipofuszinose ; Demenz ; PET ; MRT ; Key words Kufs disease ; Neuronal ceroid lipofuscinosis ; Dementia ; PET ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The case of a 35-year-old man with progressive dementia from the age of 17 is presented. Clinical examination showed mild extrapyramidal and cerebellar signs and rare myoclonus. Neuropsychological evaluation disclosed severe cognitive deficits. Magnetic resonance imaging (MRI) revealed moderate generalized atrophy with abnormal iron deposition in the basal ganglia. Positron emission tomography (PET) with 18-fluorodeoxyglucose (18-FDG) demonstrated clear temporoparietal hypermetabolism. The clinical symptoms and course are typical for the rare adult type of neuronal ceroid lipofusconoses (Kufs' disease). The diagnosis is supported by the electron microscope detection of an abnormal accumulation of lipid vacuoles and lipofuscin in the eccrine sweat glands and the rectal ganglia cells.
    Notes: Zusammenfassung Berichtet wird der Fall eines 35-jährigen Patienten mit langsam progredienter Demenz seit dem 18. Lebensjahr. Zum Zeitpunkt der Untersuchung fielen klinisch eine leichtgradige extrapyramidale und zerebelläre Symptomatik sowie seltene Myoklonien auf, während die neuropsychologische Testung ausgeprägte kognitive Defizite ergab. Die kraniale Magnetresonanztomographie zeigte eine mäßige globale Atrophie und eine abnorme Eisenablagerung in den Basalganglien. In der Positronenemissionstomographie mit 18-FDG war ein deutlicher temporoparietaler Hypometabolismus erkennbar. Klinik und Verlauf sind typisch für die seltene adulte Variante der neuronalen Zeroidlipofuszinosen (Kufs-Typ). Diese Diagnose wird gestützt durch den elektronenmiroskopischen Nachweis abnormer Akkumulationen von Fettvakuolen und Lipofuszinablagerungen in den ekkrinen Schweißdrüsen der Haut und in den rektalen Ganglienzellen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 41
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Manganintoxikation ; Parkinsonismus ; MRT ; Verlaufskontrolle ; L-Dopa-Therapie ; Key words Manganese intoxication ; Parkinsonism ; MRI ; Follow-up study ; L-dopa treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Manganese intoxication is an unusual, severe form of intoxication. This report deals with a patient now 80 years old who accidentally ingested a solution of potassium permanganate for a period of at least 4 weeks 14 years ago. Since then, the patient suffers from a mild parkinsonian syndrome and distally accentuated polyneuropathies. Psychiatric disorders, especially demential or depressive symptoms, were not observed. Manganese analysis of his hair still shows a clear increase in manganese concentration. The MRI of his brain showed no pathological changes, in particular none of those often described with symmetric signal elevation in T1 in the area of the basal ganglia. In this study, we present clinical, laboratory, and neuroradiological findings. Unusual in this case with a short exposition is the long duration and clinical improvement without L-dopa treatment.
    Notes: Zusammenfassung Eine Manganintoxikation ist eine ungewöhnliche, schwere Intoxikationsform. Wir berichten über einen jetzt 80-jährigen Patienten, der vor 14 Jahren über die Dauer von mindestens 4 Wochen versehentlich Kaliumpermanganat eingenommen hatte. Der Patient leidet weiterhin unter einem leichten Parkinsonsyndrom und einer distal betonten Polyneuropathie. Psychiatrische St¨rungen, insbesondere ein dementielles oder depressives Symptom, fanden sich nicht mehr. Die Mangananalysen der Haare zeigen auch jetzt noch deutlich erhöhte Konzentrationen. Das MRT des Gehirns erbrachte keinen pathologischen Befund, insbesondere keine häufig bei Manganintoxikationen beschriebenen Veränderungen mit symmetrischen Signalanhebungen in T1-Wichtung im Bereich der Basalganglien (Globus pallidus). In einer aktuellen Untersuchung werden klinische, laborchemische sowie neuroradiologische Ergebnisse vorgestellt. Die Besonderheit des Falles erklärt sich aus einer kurzen Expositionsdauer mit einer langen Verlaufszeit und klinischer Befundbesserung ohne L-Dopa-Behandlung.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 42
    Electronic Resource
    Electronic Resource
    Springer
    Der Orthopäde 29 (2000), S. 987-993 
    ISSN: 1433-0431
    Keywords: Schlüsselwörter Behinderungen ; Integration von Behinderten ; Lebensqualität ; Gesellschaftliche Einstellungen ; Sport ; Paralympiade ; Keywords Disabilities ; Integration of disabled persons ; Quality of life ; Social attitudes ; Sports ; Paralympics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract It is important to reflect back on the enormous changes that have taken place in society over the past century that have affected the quality of life of disabled persons and societal attitudes towards disability. Although great progress has been made, these people remain marginalized and disadvantaged, and despite all the efforts of volunteers, professionals, and governments, we cannot categorically state that they are fully socially integrated. The term disability continues to carry an enormous stigma, and therefore it is important to examine the concept of social integration and the issues around it as they affect disabled persons and the role of the International Paralympic Committee (IPC) movement in achieving this end.
    Notes: Zusammenfassung Nach Ablauf des letzten Jahrhunderts ist es wichtig auf die enormen gesellschaftlichen Veränderungen zurückzublicken und darauf, wie dieser Wandel die gesellschaftlichen Einstellungen gegenüber Behinderungen und die Lebensqualität von Behinderten verändert hat. Obwohl große Fortschritte gemacht wurden sind Behinderte immer noch eine benachteiligte Randgruppe; trotz aller Anstrengungen von Freiwilligen, Fachpersonal und Regierungen kann man noch nicht behaupten, dass sie voll gesellschaftlich integriert sind. Der Begriff “Behinderung” beinhaltet weiterhin ein großes Stigma. Deshalb ist es wichtig, das Konzept und die verschiedenen Aspekte der sozialen Intergration von Behinderten zu prüfen und die Rolle des Internationalen Paralympischen Kommittees (IPC) zur Verwirklichung dieser Ziele darzustellen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 43
    Electronic Resource
    Electronic Resource
    Springer
    Der Unfallchirurg 103 (2000), S. 371-374 
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Knieendoprothese ; Lebensqualitätsgewinn ; Key words Knee endoprosthesis ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract From a group of 41 consecutive patients receiving an endoprosthetic knee replacement 35 patients underwent complete pre- and postoperative documentation of life quality in the short term follow-up. The comparison of pre- and postoperative life quality assessment with the SF-36 form showed significant differences on the 5% level for the categories “somatic pain” and “psychological wellness”. The parameter “somatic functionality” showed with a P-value of 0.0616 almost significant improvement. The other parameters also showed improved values without reaching statistical significance. In summary, after implantation of a total knee replacement an improvement of life quality can be documented.
    Notes: Zusammenfassung Aus einem Gesamtkollektiv von 41 nacheinander operierten Patienten konnten bei 35 Daten hinsichtlich der allgemeinen Lebensqualität im kurzfristigen Verlauf dokumentiert werden. Bei der Untersuchung der prä und post-operativen Lebensqualität mit Hilfe des SF-36-Scores zeigten sich auf dem 5-%-Niveau eine signifikante Verbesserung in den Kategorien “Körperliche Schmerzen” und “psychisches Wohlbefinden”. Mit einem P-Wert von p = 0,0616 kann eine fast signifikante Verbesserung in der körperlichen Funktionsfähigkeit konstatiert werden. Weitere 5 untersuchte Unterpunkte zeigten keine signifikante Verbesserung, jedoch bessere Werte bei den errechneten Mittelwerten. Zusammenfassend ist festzustellen, daß die Implantation einer Knieendoprothese zu einem deutlichen Gewinn in der Lebensqualität des kranken Menschen führt.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 44
    Electronic Resource
    Electronic Resource
    Springer
    Clinical and experimental nephrology 4 (2000), S. 24-28 
    ISSN: 1437-7799
    Keywords: Key words Uranyl acetate ; ARF ; Glycine ; Apoptosis ; Tubular damage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. Although uranyl acetate (UA) is known to induce apoptosis in renal tubular cells, the pathophysiological role of apoptotic cell death in UA-induced acute renal failure (ARF) is not clear. In this study, we examined whether glycine, which is known to provide protection against nephrotoxic acute renal failure, attenuated tubular damage in UA-induced ARF in rats, and, if so, whether the attenuation of tubular damage was associated with reduced apoptotic cell death. Methods. Sprague-Dawley rats were allocated to three groups; normal controls, UA-treated, and UA plus glycine-treated. Acute renal failure was induced by the intravenous injection of UA (5 mg/kg). UA plus glycine-treated rats were given glycine at 1 g/kg, i.v. over 3 min at the same time as the UA injection. Serum creatinine concentration (Scr) and tubular damage score were examined 5 days after UA administration. Apoptosis was evaluated by counting the number of terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling (TUNEL)-positive cells in the outer stripe of the outer medulla. Results. Glycine significantly decreased the UA-induced increases in Scr (3.73 ± 0.31 vs 2.74 ± 0.11 mg/dl; P 〈 0.05) and the tubular damage score (3.83 ± 0.13 vs 2.58 ± 0.01; P 〈 0.01). UA significantly increased the number of TUNEL-positive cells in the outer stripe of the outer medulla (0.16 ± 0.04 vs 7.45 ± 0.46/high power field at ×400 magnification; P 〈 0.01 vs normal control value). Glycine infusion significantly lessened the number of TUNEL-positive cells (5.84 ± 0.31/ high power field at ×400 magnification; P 〈 0.01 vs UA-treated rats). A significant correlation was found between the number of TUNEL-positive cells and the tubular damage score (r = 0.93; P 〈 0.01). Conclusion. Glycine ameliorated the severity of UA-induced ARF and the degree of apoptotic cell death. This finding suggested that the protective effect of glycine in UA-induced ARF may be mediated, at least in part, through a reduction of apoptosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 45
    ISSN: 1437-7772
    Keywords: Key words Gastric carcinoma ; Isolated hepatic recurrence ; Arterial infusion therapy ; Low-dose CDDP and continuous 5-FU ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Patients with metachronous liver metastasis after curative resection of gastric carcinoma generally have a poor prognosis, even when recurrence is confined to the liver. We report a patient in whom hepatic arterial infusion therapy with bolus low-dose cisplatin (CDDP) and continuous 5-fluorouracil (5-FU) was effective against large metastases confined to the liver. An 83-year-old man was admitted with huge liver metastases from gastric carcinoma. Intra-arterial bolus injection of low-dose CDDP (5 mg) and continuous intra-arterial infusion of 5-FU (250 mg/day for 7 days) was started. After four courses of this arterial infusion therapy, computed tomography scans revealed shrinkage of the liver metastases. He was followed-up as an outpatient and continued to receive the arterial infusion therapy once every 4 weeks. Throughout the course of the chemotherapy, a partial response of the liver metastases was maintained. The patient had an improved quality of life after starting the chemotherapy, and he survived for 16 months from the commencement of the therapy. Arterial infusion therapy with bolus low-dose CDDP and continuous 5-FU may be recommended for patients with isolated hepatic recurrence of gastric carcinoma.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 46
    Electronic Resource
    Electronic Resource
    Springer
    International journal of clinical oncology 5 (2000), S. 200-203 
    ISSN: 1437-7772
    Keywords: Key words Small cell carcinoma of the ovary ; Pregnancy Paclitaxel ; MRI ; Facial palsy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Small cell carcinoma of the ovary (SCCO) is a highly aggressive malignancy that affects young females. The disease is fatal in nearly all patients with disease categorized as higher than stage IA. A 30-year-old Japanese woman was diagnosed, while pregnant, as having bilateral small cell carcinoma, pulmonary type, a rare finding. She received three courses of JP chemotherapy (carboplatin, 525 mg; cisplatin, 120 mg) and three courses of PVP chemotherapy (peplomycin, 30 mg; vinblastin, 12 mg; cisplatin, 120 mg). Computed tomography scans were taken during and after the period in which she received chemotherapy showed growing multiple metastatic tumors and massive ascites. Third-line chemotherapy with paclitaxel (225 mg) was then initiated. Although the lymphadenopathy and massive ascites were alleviated, bone marrow suppression intervened. The patient died 18 months after being diagnosed. To our knowledge, this is third reported case of SCCO to be diagnosed during pregnancy, and the first reported case of bilateral disease diagnosed during pregnancy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 47
    ISSN: 1437-9813
    Keywords: Key words Adriamycin ; Apoptosis ; Embryogenesis ; Esophageal atresia ; Notochord ; VATER association
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The adriamycin-induced rat model of the VATER association has provided a means of studying the morphogenesis of a variety of major congenital structural abnormalities similar to those seen in humans with the VATER association. Most interest has been centered on the foregut, where the model has clarified some aspects of the development of esophageal atresia (EA), tracheal agenesis, and other communicating bronchopulmonary foregut malformations. It has demonstrated aberrations in the nerve supply to the esophagus in EA and allowed the study of tracheomalacia. A relationship between an abnormal notochord, foregut abnormalities, and vertebral defects has been shown, and the model has reignited interest in the role of the notochord as a regional organizer of axial development. The normal temporospatial characteristics of apoptosis during fore- and hindgut development is disturbed in this model, resulting in abnormal morphology. The indications are that this model will continue to clarify the processes that lead to many of the structural congenital abnormalities that are seen in infants born with the VATER association.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 48
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 16 (2000), S. 485-487 
    ISSN: 1437-9813
    Keywords: Key words Duodenum ; Apoptosis ; Fetus ; Rat ; Duodenal atresia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Duodenum is thought to go through a solid-core stage followed by recanalization during its development. This study investigates the role of apoptosis in normal duodenal development, especially during widening of the lumen, and hence, the possible role of apoptosis in duodenal atresia (DA). Twenty-four time-mated Sprague-Dawley rats were killed from day 13 to day 20 of gestation. Duodenums of 3 fetuses were chosen randomly from each rat and processed. Apoptosis was determined by the terminal deoxytransferase-mediated biotin dUTP nick-end labeling (TUNEL) technique (ApopTag). Apoptosis count and cross-sectional areas were measured with an image analyzer (MetaMorph). The number of apoptotic cells per unit area duodenum peaked on day 15 for the mucosal/submucosal layer and on day 14 for the muscular/mesenchymal layer. The maximal number of apoptotic cells per cross-section of duodenum was between 7 and 8. The cross-sectional areas of the duodenal wall and lumen increased exponentially between day 17 and day 19 while duodenal-wall thickness remained relatively constant throughout duodenal development. The localization, timing, and intensity of apoptosis do not suggest that apoptosis is responsible for the widening of the duodenal lumen; enlargement of the lumen is related to the increase in duodenal circumference. Apoptosis thus may not be involved in the pathogenesis of DA.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 49
    ISSN: 1437-7772
    Keywords: Key words Photodynamic therapy ; Cervical cancer ; Apoptosis ; MnSOD ; Gene induction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. Photodynamic therapy (PDT) is a cancer treatment modality in which systemic administration of a tumor-localizing photosensitizer is followed by irradiation of the tumor with visible light. Although PDT is undergoing clinical trials for various cancers, the mechanisms of its action are not fully understood. To investigate the mechanism of cell death by PDT, we performed in-vitro PDT, using Photofrin II as a photosensitizer, in two human cervical carcinoma cell lines, HeLa and CaSki. Methods. Cells were incubated with Photofrin II for 24 h, followed by illumination, using a YAG-OPO laser. Cell survivability after PDT was evaluated by an MTT assay. Cytotoxicity was assayed by measuring the release of lactate dehydrogenase (LDH) into the supernatant. DNA of the PDT-treated cells was electrophoresed in an agarose gel to determine fragmentation. In situ detection of apoptosis in the PDT-treated cells was performed by identification of the 3′-OH ends of DNA. In addition, induction of manganese superoxide dismutase mRNA (MnSOD) was analyzed in the PDT-treated cells. Results. The CaSki cells were more sensitive to this PDT treatment than were the HeLa cells. DNA fragmentation was observed with less than 5 μg/ml of Photofrin II in both cell lines, whereas PDT-induced cell membrane destruction, determined by LDH release, was observed only at 10 μg/ml. The MnSOD mRNA was induced in the HeLa cells in the early hours after PDT with a non-lethal dose of Photofrin II, but was reduced with a high dose, whereas the CaSki cells did not show any induction of the MnSOD gene by PDT. Conclusion. The present results suggest that PDT induces cell death by a mechanism involving membrane destruction and apoptosis. Differences in cell susceptibilities to PDT may depend upon a protective mechanism, such as MnSOD gene induction.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 50
    ISSN: 1437-7780
    Keywords: Key words Gastric cancer ; Low-dose FP ; Pharmacokinetics ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To analyze the clinical efficacy of a protracted infusion of low-dose 5-fluorouracil (5-FU) and cisplatin (CDDP), a phase II study was performed in 36 patients with advanced gastric cancer. The treatment schedule of the low-dose administration of 5-FU and CDDP (FP) was a continuous infusion of 5-FU (250 mg/m2) for 28 consecu-tive days and a drip infusion of CDDP (3.5 mg/m2) for 5 consecutive days, followed by a 2-day interval each week in one cycle. The overall response rate was 47.2%. Of importance, the improvement in quality of life assessed by performance status (PS) and oral intake was 13.9% and 33.3%, respectively. The toxicity in low-dose FP treatment was less than grade 2, including gastrointestinal toxicities and bone marrow suppression, and this was tolerable during the treatment. The median survival time (MST) and 1-year survival rate were 8 months and 36.2%, respectively. In a pharmacokinetic analysis following the protracted infusion of low-dose FP, the plasma concentrations of 5-FU and CDDP were increased to about 120–130 ng/ml and 0.3–0.5 μg/ml on day 21 after the treatment, respectively. The plasma concentrations of 5-FU and CDDP were not significantly different between responders and non-responders. The tumor response to low-dose FP treatment was associated with the induction of apoptotic cell death and with the overexpression of apoptosis-related genes, such as Bax and Bcl-Xs, in cancer cells. These results indicate that the protracted infusion of low-dose FP could be a useful regimen for patients with advanced gastric cancer, in terms of the high response rate and low toxi-city, possibly leading to the prolongation of survival and improvement in the quality of life.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 51
    ISSN: 1437-7772
    Keywords: Key words Endometrial carcinoma ; MRI ; Diagnosis ; Minimally invasive therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. Magnetic resonance imaging (MRI) provides precise staging of endometrial carcinoma. However, we have sometimes experienced patients with microscopic extrauterine extension in whom MRI showed the disease as being limited to the uterus. We studied indirect MRI signs for microscopic extrauterine spread of endometrial carcinoma which outwardly seemed to be limited to within the uterus. Methods. MRI studies and the clinical records of 100 patients with surgically proven endometrial carcinoma were retrospectively reviewed. We evaluated: (1) MRI staging, (2) tumor growing at the orifices of the fallopian tube in the uterine fundus, (3) hydrosalpinx, and (4) ascites, in each MRI study. Results. Surgical specimens showed that 12 of the 100 patients had extrauterine spread, with 1 patient showing both ovarian extension and omental metastasis; there ovarian extension in 3, extension to the fallopian tubes in 3, omental metastasis in 1, and positive peritoneal cytology in 4. Tumor growing at the orifices of the fallopian tubes with deep myometrial invasion showed higher accuracy for predicting microscopic intrauterine spread (82.0%) although it was not significantly different from the accuracy of deep myometrial invasion anywhere within the uterus (75.0%). However, tumor growing at the orifices of the fallopian tubes in a patients with stage Ia disease showed a high negative predictive value (89.7%). Hydrosalpinx had the highest specificity (98.9%) and accuracy (88.0%); however, it did not seem to be practical because it was observed in only 2 patients. Ascites in postmenopausal patients showed higher specificity (93.5%), although it was not considered to be useful in the premenopausal patients. Conclusion. Tumor extension at the orifices of the fallopian tubes in patients with stage Ia disease, and ascites in postmenopausal patients on MRI seemed to be predictive factors for microscopic extrauterine spread.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 52
    ISSN: 1437-7772
    Keywords: Key words BAK cells ; T24 cells ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. We previously reported the basic characteristics of BCG (bacille Calmette-Guérin)-activated killer (BAK) cells, which exhibited antitumor effects against the bladder cancer cell line T24. Our study suggested that both BCG and BAK cells were responsible for the inhibition of tumor cell proliferation; however, the basic mechanism of BCG or BAK cells in this inhibition was not clear. We here report the antitumor effects of BAK cells, which correlated with the induction of apoptosis in T24 cells. Methods. Lymphocytes were cultured with BCG to examine 3H-thymidine uptake, and the subpopulation was evaluated by immunocytometry. T24 cells were then cultured with BAK cells for the analysis of 3H-thymidine uptake and apoptosis induction by DNA electrophoresis; pathology study, and cell-cycle analysis were also done. Culture supernatants of BAK and T24 cells were also investigated to detect interferon-γ (IFN-γ), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α). Results. The 3H-thymidine uptake study of lymphocytes showed that BCG activated the lymphocytes. Evaluation by immunocytometry revealed that CD4+ and CD8+ T cells were induced by BCG. The 3H-thymidine uptake study of T24 cells revealed that BAK cells inhibited tumor cell proliferation. DNA electrophoresis, the morphological study, and cell-cycle analysis by immunocytometry demonstrated that apoptosis in T24 cells was induced when they were cultured with BAK cells. IFN-γ, IL-6, and TNF-α were detected in the culture supernatants of BAK and T24 cells. Conclusions. Cytokine production and the induction of apoptosis may, together, be the major mechanisms of the antitumor action seen when BAK cells were employed against T24 cells; BAK cells could be employed as clinical effectors against bladder cancer.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 53
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 40-44 
    ISSN: 1432-2161
    Keywords: Key words Subchondral insufficiency fracture ; Femoral head ; Medial femoral condyle ; Osteonecrosis ; MRI ; X-ray
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  This case report documents the clinical, radiographic, and histologic findings in a 69-year-old obese man, who had subchondral insufficiency fracture both in the femoral head and medial femoral condyle. On plain radiographs, both lesions underwent subchondral collapse. Magnetic resonance images of the left hip showed a bone marrow edema pattern with associated low-intensity band on T1-weighted images, which was convex to the articular surface. The histopathologic findings in the hip and knee were characterized by the presence of a subchondral fracture with associated callus and granulation tissue along both sides of a fracture line. There was no evidence of antecedent osteonecrosis. To our knowledge, this is the first case report to describe the multiple occurrence of collapsed subchondral insufficiency fracture.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 54
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 45-48 
    ISSN: 1432-2161
    Keywords: Key words Cystic fibrous dysplasia ; Giant cell tumor ; Femur ; X-ray ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report the case of a 43-year-old man who presented with an osteolytic and expansive lesion in the left distal femur mimicking a giant cell tumor. Magnetic resonance imaging (MRI) showed that most of the lesion was cystic, and histological examination revealed fibrous dysplasia with marked cystic degeneration. Radiographic findings of cystic fibrous dysplasia in the end of a long bone may be similar to those of a giant cell tumor, and a biopsy is essential for the final diagnosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 55
    ISSN: 1432-2161
    Keywords: Key words Hemangiopericytoma ; Tibia ; MRI ; Angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The Magnetic Resonance Imaging (MRI) appearances of primary osseous hemangiopericytoma (HPC) have been rarely described. We report on a 46-year-old Chinese man with primary osseous HPC of the right tibia. The characteristic vascular distribution of this tumor, presenting with a ”spoke-wheel” appearance on MR images and with angiographic correlation, is described. Although not pathognomonic, this MR appearance may be an important finding in suggesting the diagnosis of osseous HPC.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 56
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 555-562 
    ISSN: 1432-2161
    Keywords: Keywords Diffusion ; MRI ; Skeletal system ; Spine ; neoplasms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  This article reviews the principles of diffusion-weighted imaging (DWI) and recent results in DWI of the musculoskeletal system. The potential of DWI in the diagnosis of pathology of the musculoskeletal system is discussed. DWI is a relatively new MR imaging technique that has already been established in neuroradiology, especially in the early detection of brain ischemia. The random motion of water protons on a molecular basis can be measured with DWI. To date DWI of the abdomen and of the musculoskeletal system has only been employed in scientific studies, but first results indicate that it may also be beneficial in these fields. Different diffusion characteristics have been found in normal tissues such as muscle, fat and bone marrow. Also, pathologic entities such as neoplasms, post-therapeutic soft tissue changes and inflammatory processes can be differentiated. Normal muscle shows significantly higher diffusion values than subcutaneous fat and bone marrow, due to a higher mobility of water protons within muscle. Soft tissue tumors exhibit a significantly lower diffusion value compared with post-therapeutic soft tissue changes and inflammatory processes. Necrotic tumor tissue can be distinguished from viable tumor due to significantly higher diffusion of water protons within necrotic tissue.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 57
    ISSN: 1432-2161
    Keywords: Keywords Gaucher disease ; MRI ; Enzyme replacement therapy ; Liver ; Spleen ; Bone marrow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Purpose. To determine whether T1-weighted magnetic resonance (MR) images can demonstrate response in the marrow of patients with type 1 Gaucher disease treated with enzyme replacement therapy (ERT) and to determine whether a relationship exists between liver and spleen volume reductions and visible marrow changes. Patients. Forty-two patients with type 1 Gaucher disease were evaluated on at least two occasions. Thirty-two patients received ERT. Of these patients, 15 had a baseline examination prior to the initiation of ERT. The remaining 10 patients did not receive ERT. Design. T1-weighted and gradient recalled echo (GRE) coronal images of the femurs and hips were obtained. Concurrently, liver and spleen volumes were determined using contiguous breath-hold axial gradient-echo images. T1-weighted images of the hips and femurs were evaluated to determine change or lack of change in the yellow marrow. Results. Of the 32 patients receiving ERT, 14 (44%) demonstrated increased signal on T1-weighted images suggesting an increase in the amount of yellow marrow. If only the 15 patients with a baseline examination were considered, the response rate to ERT was 67%. Using Student’s t-test a highly significant correlation (P〈0.005) was found between marrow response and reduction in liver and spleen volume. Conclusions. Marrow changes in patients receiving ERT can be detected by T1-weighted images. This response correlated with reductions in visceral volumes (P〈0.0005).
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 58
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 597-600 
    ISSN: 1432-2161
    Keywords: Keywords Parosteal osteosarcoma ; Telangiectatic osteosarcoma ; Dedifferentiation ; Femur ; Radiography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A unique case of parosteal osteosarcoma (POS) of the proximal femur, with areas of telangiectatic dedifferentiation, in a 28-year-old woman is reported. The patient had a 7-week history of pain and swelling in her right thigh. A biopsy diagnosis of POS was established. The patient was treated with two cycles of intra-arterial chemotherapy, followed by limb salvage surgery. Histological examination of the resected specimen showed POS with areas of dedifferentiation composed of high-grade telangiectatic osteosarcoma with associated secondary aneurysmal bone cyst change.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 59
    ISSN: 1432-2161
    Keywords: Keywords Ewing sarcoma ; Primitive neuroectodermal tumour ; Radiography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective.To describe the clinical, radiological and MRI features of six atypical cases of histologically proven appendicular Ewing sarcoma/ primitive neuroectodermal tumour (PNET). Design. Retrospective review of case notes and available imaging was carried out. Patients. Six patients (4 male, 2 female; mean age 27years, range 19–44 years), presenting over a 77-month period, were identified from the Bone Tumour Register. All had unusual clinical and imaging features for Ewing sarcoma/PNET. Results and conclusions. Four tumours were centred on the distal femoral metaphysis, one in the proximal tibial metaphysis and one in the distal tibial metaphysis. Plain radiographs were available in four cases and showed minor cortical changes. MRI demonstrated a relatively small, eccentrically located intraosseous component with a large, eccentric extraosseous component. Extension into the epiphysis was seen in three cases and into the adjacent joint in two cases. Intraosseous ”skip” metastases were present in three cases. The clinical and imaging features were atypical for conventional intraosseous Ewing sarcoma/PNET and the exact site of origin (intraosseous, periosteal or soft-tissue) was unclear.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 60
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 656-659 
    ISSN: 1432-2161
    Keywords: Keywords Osteoblastoma-like osteosarcoma ; Osteosarcoma ; Aggressive osteoblastoma ; Fibula ; Radiography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report an osteoblastoma-like osteosarcoma in the right proximal fibula in a 22-year-old woman. Radiographs showed an irregular osteolytic lesion from the metaphysis to the epiphysis in the proximal fibula with partial destruction of cortical bone. Tissue from a biopsy indicated a typical osteoblastoma. Curettage and bone graft was performed. One year after the surgery, local recurrence occurred, and a wide excision was performed. Histological examination of the en-bloc surgical specimen revealed the tumor had permeated through the host bony trabeculae, although the nuclear atypia was not marked. Immunohistochemical expression of MIB-1 was detected in 9.0% of cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 61
    ISSN: 1432-2161
    Keywords: Keywords Acute lymphoblastic leukemia ; Chemotherapy ; Spine ; Tunneling Schmorl’s nodes ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We present a 70-year-old woman with pre-B acute lymphoblastic leukemia in whom serial imaging studies showed the development of multiple vertebral collapse, and communicating superior and inferior Schmorl’s nodes creating a longitudinal channel (”tunneling” Schmorl’s nodes) through the anterior aspect of T12 to L3 vertebral bodies of her osteoporotic thoracolumbar spine. This was observed after achieving complete remission of the disease and during maintenance therapy. The finding is felt to be secondary to iatrogenic exacerbation of osteoporosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 62
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 664-667 
    ISSN: 1432-2161
    Keywords: Keywords Giant cell tumor ; Multiple mid-foot bones ; Reconstructive surgery ; Radiography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report on a patient who had giant cell tumor involving multiple bones of the mid-foot. The tumor originated from the navicular bone, but also destroyed the cuboid, and all cuneiform bones. This unusual presentation of giant cell tumor presented a therapeutic challenge for the surgeons. The patient was treated with en bloc resection and the bony defect replaced with a massive iliac crest graft which united within 9 months and has remained stable for 7 years without local recurrence, and with excellent function of the foot.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 63
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 224-226 
    ISSN: 1432-2161
    Keywords: Key words Intraosseous neurilemmoma (schwannoma) ; Primary bone neoplasm ; Metacarpal ; X-ray ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Intraosseous schwannoma (neurilemmoma) is an extremely rare, benign neoplasm, constituting less than 0.2% of primary bone tumors. It infrequently involves the bones of the hand. We present a case of intraosseous neurilemmoma of the metacarpal.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 64
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 231-234 
    ISSN: 1432-2161
    Keywords: Key words Hemangioma ; Ulna ; CT ; MRI ; X-ray
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  An 18-year-old woman presented with left elbow joint pain. Radiographs and computed tomographic scan showed a well-defined osteolytic lesion of the left ulna associated with a honeycomb appearance on the radiographs. Magnetic resonance images showed intermediate signal intensity on T1-weighted images and mixed intermediate and high signal intensities on T2-weighted images. Only the periphery of the lesion enhanced with intravenously injected gadolinium-diethylenetriamine pentaacetic acid. The lesion was curetted to avoid pathologic fracture, and a histologic diagnosis of cavernous hemangioma of bone was made. Hemangioma involving the ulna is rare, but should be included in the differential diagnosis of a radiographic osteolytic lesion with a honeycomb appearance.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 65
    ISSN: 1432-2161
    Keywords: Key words Soft tissue neoplasm ; Metastasis ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To describe a series of patients with no known primary malignancy who presented with a solitary unsuspected soft tissue metastasis masquerading as a soft tissue sarcoma, and secondarily to describe the imaging appearance of these lesions. Design. Records of two academic hospitals with active orthopedic oncology services were reviewed for patients meeting the above criteria. Clinical charts were examined, and the imaging appearance of the soft tissue lesions retrospectively reviewed. Patients. Of 1421 patients examined for soft tissue lesions, 11 were found who met the above criteria. Results. Of the 11 patients whose initial presentation was a solitary soft tissue metastasis, eight were found to have a primary lung cancer, two were diagnosed with adenocarcinoma of unknown primary, and adenocarcinoma of the colon was discovered in the remaining patient. Conclusions. The clinical presentation of a solitary soft tissue metastasis without a known primary malignancy is a rare occurrence, with an incidence of approximately 0.8%. Lung cancer is the primary neoplasm in a high percentage of these cases.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 66
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 293-297 
    ISSN: 1432-2161
    Keywords: Key words Angiomyolipoma (AML) ; Soft tissue ; Thigh ; MRI ; CT ; Angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A 41-year-old man presented with an asymptomatic mass in the right medial thigh. Magnetic resonance imaging (MRI) revealed a well-demarcated, 10-cm mass in the right adductor muscles. The margins of the mass exhibited high signal intensity and the rest showed low or iso signal intensity on T1-weighted MR images. However, the high signal intensity was decreased on T2-weighted images with fat suppression. The central part of the tumor was of inhomogeneous high signal intensity on T2-weighted images; after Gd-DTPA injection it enhanced inhomogeneously on T1-weighted images with fat suppression. On dynamic computed tomography (CT) in the arterial phase, there were strongly enhancing spotty areas in the tumor. At surgery, a yellow-whitish tumor was resected and a pathological diagnosis of angiomyolipoma (AML) in the thigh was made.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 67
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 346-348 
    ISSN: 1432-2161
    Keywords: Key words Amyloid tumor ; Tibia ; Periosteum ; Bilateral ; MRI ; Bilateral metachronous periosteal tibial amyloid tumors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Localized primary periosteal amyloid tumors are extremely rare. A case of bilateral tibial amyloid tumor is presented. A 62-year-old woman initially presented with a painful mass in the anterior aspect of the right leg. There was no evidence of underlying systemic disease, including chronic infection or malignancy. Based on the results of resistance with Congo red staining to treatment with potassium permanganate and positivity for kappa light chain, we classified this particular case as AL-type amyloidosis. The patient noticed a swelling in the opposite leg 2 years later. The second tumor was also an AL-type amyloidoma. Amyloid tumors are generally solitary. This is the first case of bilateral periosteal amyloid tumors of the AL-type occurring in the tibiae.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 68
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 387-391 
    ISSN: 1432-2161
    Keywords: Key words Trauma ; Hand ; Sonography ; Ultrasound ; Annular pulleys ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To evaluate the sonographic (US) appearance of digital annular pulley (DAP) tears in high-level rock climbers. Design and patients. We performed a retrospective analysis of the US examinations of 16 high-level rock climbers with clinical signs of DAP lesions. MRI and surgical evaluation were performed in five and three patients respectively. The normal US and MRI appearances of DAP were evaluated in 40 and three normal fingers respectively. Results. Nine of 16 patients presented a DAP tear. In eight subjects (seven with complete tears involving the fourth finger and one the fifth finger), US diagnosis was based on the indirect sign of volar bowstringing of the flexor tendons. Injured pulleys were not appreciated by US. Tears concerned the A2 and A3 in six patients and the A3 and A4 in two patients. A2 pulley thickening and hypoechogenicity compatible with a partial tear was demonstrated in one patient. MRI and surgical data correlated well with the US findings. Four patients had tenosynovitis of the flexor tendons but no evidence of pulley disruption. US examinations of three patients were normal. In the healthy subjects US demonstrated DAP in 16 of 40 digits. Conclusion. US can diagnose DAP tears and correlates with the MRI and surgical data. Because of its low cost and non-invasiveness we suggest US as the first imaging modality in the evaluation of injuries of the digital pulley.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 69
    ISSN: 1432-2161
    Keywords: Key words Bones ; infection ; Bones ; radionuclide studies ; MRI ; comparative studies ; Bones ; MRI studies ; MRI ; extremities ; Bones ; immunoscintigraphy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. A retrospective study of the validity of combined bone scintigraphy (BS) and immunoscintigraphy (IS) using 99mTc-labelled murine antigranulocyte antibodies (MAB) and magnetic resonance imaging (MRI) in chronic post- traumatic osteomyelitis. Design and patients. The results of MRI and combined BS/IS of 19 lesions in 18 patients (13 men, 5 women; mean age 45 years, range 27–65 years) were independently evaluated by two radiologists and one nuclear medicine physician with regard to bone infection activity and extent. The patient group was a highly selective collection of clinical cases: the average number of operations conducted because of relapsing infection was eight (range 2–27), the average time interval between the last surgical intervention and the present study was 6.5 years (range 3 months to 39 years), and from the first operation was 14 years (range 1.5–42 years). Interobserver agreement on MRI was measured by kappa statistics. Sensitivity, specificity, accuracy, positive predictive value (PPV) and negative predictive value (NPV) were calculated for MRI and the nuclear medicine studies. Results. For MRI/nuclear medicine, a sensitivity of 100%/77%, a specificity of 60%/50%, an accuracy of 79%/61%, a PPV of 69%/58% and a NPV of 100%/71% were calculated. Four MR examinations were false positives because of postsurgical granulation tissue. A high degree of interobserver agreement was found on MRI (κ=0.88). A low-grade infection was missed on two scintigrams, while four were false positive because of ectopic haematopoietic bone marrow, and in one examination the anatomical distortion resulted in an inaccurate assignment of the uptake leading to false positive findings. Image analysis was frequently hindered by susceptibility artefacts due to residual abrasions of metallic implants after removal of orthopaedic devices (15/18 patients); this led to limited assessment in 17% (3/18 patients). Conclusion. Acute activity in a chronic osteomyelitis can be excluded with high probability if the MRI findings are negative. In the first postoperative year fibrovascular scar cannot be distinguished accurately from reactivated infection on MRI and scintigraphy may improve the accuracy of diagnosis. MRI is more sensitive in low-grade infection during the later course than combined BS/IS. Scintigraphic errors due to ectopic, peripheral, haematopoietic bone marrow can be corrected by MRI.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 70
    ISSN: 1432-2161
    Keywords: Key words Tuberculosis ; Sternum ; Clavicle ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To describe the imaging findings in sterno-clavicular tubercular involvement. Design and patients. Fifteen patients with pathologically proven tuberculosis of the sternum and clavicle were retrospectively evaluated. Routine radiography, computed tomography (CT) and magnetic resonance imaging (MRI) were used in some or all of the patients. Clinical information and imaging features were evaluated in each case. Results. Eight patients had sterno-clavicular joint (SCJ) involvement, five had isolated sternal involvement and two had isolated clavicular involvement. Seven patients were evaluated with only CT, six with only MRI and two with both. There were eight male and seven female patients, varying in age between 16 and 78 years. Fever, swelling and pain were common presenting symptoms. Two patients were HIV positive. Radiographs were positive in only eight patients. Destruction and signal intensity (SI) changes of the sternum and clavicle, destruction of the cartilage, soft tissue changes representing granulation tissue/abscess, displacement of the adjacent structures (vessels, trachea, etc.) and inflammatory changes in the adjacent structures in the form of cellulitis and myositis were common imaging features. Conclusions. All imaging methods can provide complementary information regarding sterno-clavicular tubercular involvement that is helpful for determination of the therapy. MRI is useful in determining the extent of the lesion, particularly marrow involvement and soft tissue extent.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 71
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 477-480 
    ISSN: 1432-2161
    Keywords: Key words Diabetes mellitus ; Muscle, infarction ; Short T1 ; Hemorrhage ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We describe a case of diabetic muscle infarction which had atypical features of hyperintensity of the affected muscle on T1-weighted images. Biopsy was performed which revealed diffuse extensive hemorrhage within the infarcted muscle. We believe increased signal intensity on T1-weighted images should suggest hemorrhage within the infarcted muscle.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 72
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 481-484 
    ISSN: 1432-2161
    Keywords: Key words Meniscal ossicles ; Ultrasound ; CT-arthrography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A case of meniscal ossicles occurring in the left knee of a 23-year-old woman is presented. Radiographs showed two calcified lesions at the posteromedial aspect of the knee which were interpreted as loose bodies. Sonography, computed tomography arthrography and magnetic resonance imaging showed the fragments within the posterior horn of the medial meniscus permitting a diagnosis of meniscal ossicles. These techniques can detect meniscal ossicles and exclude intra-articular loose bodies.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 73
    ISSN: 1432-2161
    Keywords: Key words Clear cell sarcoma ; Malignant melanoma of soft parts ; MRI ; Magnetic resonance ; Neoplasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Objective. To evaluate MR imaging and pathology findings in order to define the characteristic features of clear cell sarcoma of the soft tissues (malignant melanoma of the soft parts). Design and patients. MR examinations of 21 patients with histologically proven clear cell sarcoma of the musculoskeletal system were retrospectively reviewed and assessed for shape, homogeneity, delineation, signal intensities on T1- and T2-weighted images, contrast enhancement, relationship with adjacent fascia or tendon, secondary bone involvement, and intratumoral necrosis. In 19 cases the pathology findings were available for review and for a comparative MR-pathology study. Results. On T1-weighted images, lesions were isointense (n=3), hypointense (n=7) or slightly hyperintense to muscle (n=11). Immunohistochemical examination was performed in 17 patients. All 17 specimens showed positivity for HMB-45 antibody. In nine of 11 lesions with slightly increased signal intensity on T1-weighted images, a correlative MR imaging-pathology study was possible. All nine were positive to HMB-45 antibody. Conclusions. Clear cell sarcoma of the musculoskeletal system often has a benign-looking appearance on MR images. In up to 52% of patients, this lesion with melanocytic differentiation has slightly increased signal intensity on T1-weighted images compared with muscle. As the presence of this relative higher signal intensity on T1-weighted images is rather specific for tumors displaying melanocytic differentiation, radiologists should familiarize themselves with this rare entity and include it in their differential diagnosis when confronted with a well-defined, homogeneous, strongly enhancing mass with slightly higher signal intensity compared with muscle on native T1-weighted images.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 74
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 227-230 
    ISSN: 1432-2161
    Keywords: Key words Erdheim-Chester Disease ; Lipogranuloma ; MRI ; Muscle ; Rectus femoris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report on a rare manifestation of Erdheim-Chester disease with intramuscular lipogranuloma. The patient was a 66-year-old man who noted a soft tissue mass in the right quadriceps femoris muscle. Radiographs revealed symmetrical osteosclerosis in the diametaphysis of both femora and tibiae. An open biopsy revealed a proliferation of lipid-laden histiocytes in the femoral bone marrow and the quadriceps femoris muscle. To our knowledge, this is the second case of Erdheim-Chester disease involving muscle.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 75
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 235-238 
    ISSN: 1432-2161
    Keywords: Key words Femur echinococcosis ; MRI ; echinococcosis ; Hydatid cyst surgery ; Hydatid cyst ; anticestodal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Magnetic resonance (MR) findings of a rare case of osseous echinococcosis with involvement of the femur are described. Attention is drawn to the typical MR appearances and therapeutic management.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 76
    ISSN: 1432-2161
    Keywords: Key words Tibial deficiency ; Fibular deficiency ; Congenital hip dislocation ; Transverse limb deficiency ; X-ray ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report two similar, but unrelated, patients with congenital bilateral partial deficiencies of the tibia and fibula associated with intact feet. In both patients, the tibia and fibula were absent on initial radiographs, while the femur and the tarsal bones were well developed and there was bilateral teratologic dislocation of the hips. Ultrasound and magnetic resonance imaging (MRI) studies suggested the presence of cartilaginous remnants of the tibia and fibula. There were multidirectional instabilities in the knees and ankles. The clinical and radiological features of these cases are distinct from those of congenital longitudinal deficiency of the tibia, in which the fibula is always preserved, and from longitudinal deficiency of the fibula, in which the tibia is present and the foot is usually involved. We suggest that the bilateral partial deficiencies of the tibia and fibula associated with the intact foot and teratologic dislocation of the hips is a single-entity disorder, possibly categorized as an intercalary transverse deficiency of the lower limb.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 77
    ISSN: 1432-2161
    Keywords: Key words Metastatic bone tumor ; Knee ; Spontaneous osteonecrosis ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report a case of a metastatic bone tumor that mimicked spontaneous osteonecrosis of the medial condyle of the femur on magnetic resonance imaging.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 78
    ISSN: 1432-2161
    Keywords: Key words Chronic leg ulcers ; Squamous cell carcinoma ; Malignancy ; Snake bite ; X-rays ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Chronic ulcers of the leg are common in Brazil, perhaps more common than in the developed world. We report a case of a chronic ulcer of the leg following extensive scarring due to a bite by a venomous snake, which eventually led to a squamous cell carcinoma.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 79
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 417-420 
    ISSN: 1432-2161
    Keywords: Key words Arm ; Collagenous fibroma ; Desmoplastic fibroblastoma ; Short T2 ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A recently proposed addition to fibrous tumors in soft tissue was first described as desmoplastic fibroblastoma and later renamed collagenous fibroma. This tumor is clinically and morphologically distinct and benign. However, only a few series have been reported, and the clinicopathologic features are not widely recognized. We present two cases of collagenous fibroma of the arm. Both patients presented with an enlarging, well-circumscribed and mobile soft tissue mass. Magnetic resonance imaging showed areas of low signal intensity on both T1- and T2-weighted sequences. Needle aspiration cytology revealed nondiagnostic samples because of the low cellularity of the tumors. Each of the resected tumors was composed of low-cellular spindle- to stellate-shaped cells in a fibrous matrix with clear margination. After the marginal excisions, no recurrences were observed. Clinicians should be aware of this entity to prevent overtreatment, because imaging findings and cytologic features are similar to those of desmoid tumor.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 80
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 425-438 
    ISSN: 1432-2161
    Keywords: Key words Muscles ; MRI ; Myositis ; Muscles ; Abscess ; Dermatomyositis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Inflammatory myopathies encompass a group of acquired muscle disorders caused by infectious agents (bacteria, viruses, fungi and parasitic agents) or autoimmune processes (polymyositis, dermatomyositis and other types). In suspected infection sonography, CT and MRI are all able to show edema and fluid collections in soft tissues and muscles; sonography and CT may help guidance of a needle aspiration to establish a correct diagnosis. By offering better tissue differentiation, MRI appears to be more efficient than sonography and CT in diagnosing and managing autoimmune myopathies. MRI is indeed very sensitive to the presence of water and edema, and appears to be a very good indicator for an early diagnosis of diseases. MRI may also help to evaluate the extent and number of lesions, to guide a biopsy in an area of active disease and finally to follow the evolution under therapy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 81
    Electronic Resource
    Electronic Resource
    Springer
    Skeletal radiology 29 (2000), S. 354-357 
    ISSN: 1432-2161
    Keywords: Key words Intraosseous meningioma ; Microcystic meningioma ; Parietal bone ; X ray ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Extradural ectopic meningioma is a rare tumor. We report on an example of microcystic meningioma arising in the skull of an elderly woman. Radiological examination revealed a localized osteolytic lesion in the left parietal bone. At surgery, it was discovered that the tumor was located within the skull without any evidence of extraosseous extension. The light microscopic, immunohistochemical and ultrastructural features were consistent with a microcystic variant of meningioma. To our knowledge, this is the first case of an intraosseous microcystic meningioma, and we believe that this type of meningioma should be considered in the differential diagnoses of myxoid bone tumors of the calvarium.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 82
    ISSN: 1432-2161
    Keywords: Key words Chondrolipoma ; Liposarcoma ; Mesenchymoma ; Cartilage ; Metaplasia ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Chondro-osseous differentiation of three benign or malignant fat tissue tumors – two chondrolipomas and a liposarcoma with cartilaginous metaplasia – was studied with magnetic resonance (MR) imaging and compared with their pathological findings. The results suggest that demarcation of cartilage tisssue can be clearly defined on MR imaging when the size of the cartilaginous area is large. Myxoid matrix, degenerative fat tissue and lipodystrophic change may decrease the delineation of the cartilage tissue.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 83
    ISSN: 1432-2277
    Keywords: Key words Normothermic liver ischemia ; Apoptosis ; Caspases ; Rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Normothermic ischemia and reperfusion of the liver results in microcirculatory failure followed by necrosis and cell death. Recently, another type of cell death, apoptosis or programmed cell death, was found to be activated during the early phase of reperfusion after liver ischemia. Caspases are cysteine proteinases specifically involved in the initiation and execution phases of apoptosis. The aim of this study was to demonstrate that inhibition of apoptosis by a specific inhibitor of caspases might protect the liver against ischemia/reperfusion injury. Rats were divided into three groups: group 1, control, PBS administration; group 2, Z-Asp-cmk (Z-Asp-2,6-dichlorobenzoyl-oxymethylketone) treatment; group 3, sham-operated control animals. Z-Asp-cmk (0.5 mg Z-Asp-cmk dissolved in 300 μl PBS solution containing 1 % DMSO) was injected intravenously, 2 min prior to induction of 120 min ischemia. Survival rates were compared and serum activities of aspartate aminotransferases and alanine aminotransferases were assessed in the blood collected from the suprahepatic vena cava. Histology of the liver was assessed 6 h after the end of ischemia. Apoptosis was detected by the terminal deoxynucleotidyl transferase-mediated dUTP-FITC nick end-labeling method (TUNEL method) and by electrophoresis for analysis of DNA fragmentation. Caspase activity was determined by measuring hydrolysis of the CPP32-like substrate Ac-DEVD-pNA and absorption of paranitroaniline. Z-Asp-cmk treatment significantly increased 7-day survival (95 %) compared with that in nontreated rats (30 %, P 〈 0.001). Serum activities of aminotransferases and the extent of liver congestion and necrosis were significantly (P 〈 0.001) decreased after treatment with Z-Asp-cmk. TUNEL-positive cells were detected 3–6 h after reperfusion in the control group. In Z-Asp-cmk pretreated rats, a dramatic decrease in the number of TUNEL-positive cells was observed. Analysis of DNA fragmentation of freshly isolated hepatocytes confirmed these results. Caspase activity was increased 3–6 h after reperfusion in the control group, but significantly (P 〈 0.001) decreased after treatment with Z-Asp-cmk. These findings demonstrate that liver injury following ischemia and reperfusion can be prevented by inhibition of caspases. Caspase inhibitors may have important implications for therapy in liver disease and after liver transplantation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 84
    ISSN: 1434-3916
    Keywords: Key words Shoulder ; Calcifying tendinitis ; Shock wave ; MRI ; Prediction parameters ; Clinical outcome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This prospective study examined 62 patients (65 shoulders) with chronic courses of calcifying tendinitis of the shoulder before and after low-energy extracorporeal shockwave application (ESWA) in order to identify variables associated with the outcome of this treatment. Before ESWA, radiographs and contrast-enhanced magnetic resonance imaging (MRI) of the affected shoulders were obtained in order to document the size and morphology of the calcifications and the contrast media reactions in areas of interest (deposit, synovia, bursae), respectively. In addition, a clinical evaluation was performed. After ESWA (mean follow-up 18.2 months), clinical evaluations of all 65 shoulders revealed an increase in the Constant score from 44% to 78% (p 〈 0.0001). While size (p = 0.61) and morphology (p = 0.7) of the deposits before ESWA were not associated with the clinical outcome, negative contrast reactions around the deposits (p = 0.0001), synovia (p = 0.0049) and bursae (p 〈 0.01) were associated with improved clinical outcomes. After the total study group was divided into two groups, one with Constant scores ≥ 75% (n = 43) and the other with scores 〈 75% (n = 22), the positive predictive value (ppv), specificity (sp) and sensitivity (se) were determined for the negative reaction around the deposit (ppv: 0.94; sp: 0.95; se: 0.38), synovia (ppv: 0.84; sp: 0.82; se: 0.49) and bursae (ppv: 0.86; sp: 0.86; se: 0.44). In 5 cases (7.7%), surgery of the affected shoulder during the follow-up period was performed. No major side-effects were seen in the study group. In conclusion, our results suggest that in patients with chronic calcifying tendinitis, the absence of contrast enhancement, especially around the deposit, is a strong predictive parameter of a positive clinical outcome of ESWA.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 85
    ISSN: 1433-8726
    Keywords: Key words Bladder neoplasm ; Quality of life ; QLQ-C30 ; Cystectomy ; Ileal conduit ; Orthotopic neobladder ; Urinary diversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The impact of bladder removal and urinary diversion for patients' everyday life is largely unknown. The aims of this study were to compare subjective morbidity of ileal neobladder to the urethra versus ileal conduit urinary diversion and to elucidate its influence on quality of life. A total of 102 patients who underwent cystectomy due to a bladder malignancy were included in the study. In 69 patients (67.6%) an orthotopic neobladder and in 33 patients (32.4%) an ileal conduit was performed as urinary diversion. The compliance was 99% and mean follow-up was 37 months. All patients completed two retrospective quality of life questionnaires, namely the QLQ-C30 and a questionnaire developed at our institution to ask for urinary diversion specific items. The questioning and assessment was performed by non-urologists. The results obtained from the validated (QLQ-C30) and our own specially compiled questionnaire clearly demonstrate that patients with an orthotopic neobladder are more able to adapt to the new situation than patients with an ileal conduit. In addition, neobladder to the urethra improves the quality of life because it improves self-confidence, causes better rehabilitation as well as the restoration of leisure, professional, travelling, and social activities, and reduced risk of inadvertent loss of urine. For example, 92.8% of neobladder patients did not feel handicapped at all, and 87% did not feel sick or ill, in contrast to 51.5% and 66.7% of ileal conduit patients, respectively. Of the neobladder patients, 74.6% felt absolutely safe with the urinary diversion in contrast to 33.3% in the ileal conduit group. Only 1.5% of neobladder patients had wet clothes caused by urine leakage during the day, versus 48.5% of ileal conduit patients. Moreover, 97% of our neobladder patients would recommend the same urinary diversion to a friend suffering from the same disease, but only 36% of ileal conduit patients would do so. These results demonstrate that the quality of life is preserved to a higher degree after orthotopic neobladder than after ileal conduit urinary diversion.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 86
    ISSN: 1434-0879
    Keywords: Key words Cryptorchidism ; Contralateral descended testis ; Apoptosis ; Fertility ; Rat model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Three rat strains have been studied, using a sensitive apoptotic detection method for germ-cell degeneration, to resolve the controversy regarding the effect of cryptorchidism on the contralateral descended testis (CDT). Sprague Dawley and Buffalo rats were made cryptorchid by operation at 20–22 days of age, while trans-scrotal (T-S) rats were a congenitally unilateral cryptorchid strain. Sham operated rats or normal T-S littermates were used as controls. Experiments were performed over a period ranging from 2 weeks to 18 months. Testis weight was assayed, as was the detection of apoptosis by agarose gel laddering and immunohistochemistry by using the TUNEL method. Labeled cells in 150 cross-sectioned testis tubules were counted on the TUNEL stained slides and the mean number of labeled cells per tubule was calculated. Paternity studies on Sprague Dawley and T-S rats were carried out at 12 and 24 weeks of age to assess fertility by the resultant number of pregnancies and litter sizes. Both Sprague Dawley and T-S rat models showed a biphasic distribution of apoptosis levels. This biphasic distribution was not observed in Buffalo rats as they were only studied at later time points (12–20 weeks). A significant effect on either testis weight or apoptosis in the CDT compared with the control descended testis (P ≥ 0.1) has not been found in these three cryptorchid models, and the present results are discussed with reference to observations of other researchers in rodents and humans. While the cryptorchid testis showed a high level of labeled apoptotic cells per tubule in all rat strains, fertility was not affected and remained the same as controls at 12 and 24 weeks. There was, however, a marked strain difference in fertility in T-S as compared with Sprague Dawley rats. After 24 weeks of cryptorchidism, both control and cryptorchid T-S rats had a 44% pregnancy incidence compared with a 90% pregnancy incidence in Sprague Dawley rats. In addition, litter size in T-S control and cryptorchid rats were small compared with those of Sprague Dawley rats at 12 and 24 weeks.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 87
    Electronic Resource
    Electronic Resource
    Springer
    Mund-, Kiefer- und Gesichtschirurgie 4 (2000), S. S504 
    ISSN: 1434-3940
    Keywords: Schlüsselwörter CAD/CAM ; Knochenersatzmaterial ; MRT ; Qualitätskontrolle ; Titan ; Key words Bone substitute material ; CAD/¶CAM ; MRI ; Quality control ; Titanium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Computer-assisted prefabricated skull implants of pure titanium as a bone replacement material have been used in 22 departments since 1994. Our experience with 104 implants includes clinical aspects (indication; tissue quality; surgical technique; patient guidance), but also geometric and material-specific parameters (acquisition, transfer, and evaluation of CT data; construction; manufacturing; cleaning; postoperative use of radiologic techniques). While the clinical aspects are responsibly defined by the respective surgeon, the geometric and material-specific parameters of individual implants have to comply with the laws on medical products. Therefore, the prospective documentation for each implant includes: helical CT acquisition parameters; geometric data of the computer-based skull model and implant; the cleaning procedure; and the individual marking. Medically specified pure titanium is processed by milling only so that neither purity nor structure is impaired. A specially developed milling technique guarantees the fabrication of all constructed elements down to fine details of 50 μm. Considering the necessary radiologic follow-up of defects after tumor surgery, all patients in our hospital undergo postoperative MRI examination, partly with preoperative documentation as an intraindividual control. Such comprehensive documentation and quality assurance is essential for techniques of prefabricated bone substitution. Hand in hand with scientific research and clinical application, these formal criteria have to be elaborated and fulfilled for the respective techniques. The successful determination of specifically adapted MRI sequences goes even one step further: spin-echo sequences minimize inhomogeneities of the magnetic field induced by the titanium implants and enable accurate postoperative documentation and diagnostics especially in the follow-up after tumor surgery.
    Notes: Zusammenfassung Computergestützt vorgefertigte Schädelimplantate aus Reintitan als Knochenersatzmaterial werden seit 1994 in 22 Kliniken eingesetzt. Die Erfahrungen mit 104 Implantaten umfassen klinische (Indikationsstellung; Implantatlager; Operationstechnik; Patientenführung), aber auch geometrische und materialspezifische Aspekte (CT-Datenakquisition, -transfer und -auswertung; Konstruktion; Fertigung; Reinigung; postoperative Einsatzmöglichkeit bildgebender Verfahren). Während die klinischen Aspekte im Verantwortungsbereich ärztlichen Handelns definiert werden, gilt für die geometrischen und materialspezifischen Aspekte bei individuellen Implantaten das Medizinproduktegesetz. Prospektiv werden entsprechend für jedes Implantat die Spiral-CT-Akquisitionsparameter, die Geometriedaten des rechnerinternen Schädelmodells und des Implantats, das Reinigungsverfahren und die individuelle Kennzeichnung dokumentiert. Medizinisch spezifiziertes Reintitan wird ausschließlich durch Fräsung bearbeitet, sodass weder Reinheit noch Gefüge Änderungen erfahren. Eine eigens entwickelte Frästechnik garantiert die Umsetzung aller konstruierter Elemente bis zu einer Feinheit von 50 μm. Im Hinblick auf die bei tumorbedingten Defekten notwendige bildgebende Verlaufskontrolle werden sämtliche Patienten der eigenen Klinik postoperativ mit MRT untersucht, z. T. mit einer präoperativen Darstellung als intraindividuelle Kontrolle. Eine umfassende Dokumentation und Qualitätssicherung ist für Techniken des vorgefertigten Knochenersatzes unabdingbar. Parallel zur forscherischen Entwicklung und ärztlichen Anwendung müssen diese formalen Kriterien für das jeweilige Verfahren bearbeitet und erfüllt werden. Die erfolgreiche Erarbeitung von eigens adaptierten MRT-Sequenzen geht darüber noch hinaus: Spinechosequenzen minimieren die durch die Titanimplantate erzeugten Feldinhomogenitäten und erlauben eine aussagekräftige postoperative Dokumentation und Diagnostik insbesondere nach Tumoroperationen in der Verlaufsbeobachtung.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 88
    ISSN: 1434-3940
    Keywords: Schlüsselwörter CT ; MRT ; Mundhöhlen- und Oropharynxtumoren ; Diagnose ; Tumorstaging ; Keywords CT ; MRI ; Head and neck tumors ; Diagnosis ; Staging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Problem: There is a lack of clear criteria for the use of MR and CT in the diagnosis of head and neck cancer – some of it is even contradictory. The results of this study should lead to the establishment of more clear criteria. Patients: 165 patients suffering from head and neck tumors were subjected to a total of 463 CT and 197 MRI examinations. Results: The CT and MRI staging corresponded in 67% and 60% of the oropharynx tumors, respectively, with the clinical findings. In the case of oral cavity tumors, the clinical TNM stages were identical with CT and MRI results in 50% and 43% of cases, respectively. In the case of lymphatic node staging, the frequency of error was slightly higher using MRI, at 27%, compared with the CT rate of 22%. In the evaluation of cervical lymphatic nodes, CT proved to be more sensitive attaining 78% compared to the MRI rate of 69%. Conclusion: The results provide clear indications as to the MRI and CT examinations. Primary preoperative screening and post-therapeutic aftercare should be assessed using CT, as should lymphatic node diagnosis in the neck area. In the case of special problems such as, for example, the relevant bone and periostium infiltration, MR should be considered as a supplementary examination at a second stage.
    Notes: Fragestellung: Die Differenzialindikation von MRT und CT bei der Diagnostik von Malignomen im Kopf-Hals-Bereich wird in der Literatur kontrovers diskutiert. Mit der vorliegenden Studie soll versucht werden, eine eindeutige Auswahl des Verfahrens zu begründen. Patientengut: Bei 165 Patienten mit Tumoren des Oropharynx und der Mundhöhle wurden insgesamt 463 CT- und 197 MRT-Untersuchungen durchgeführt. Ergebnisse: Bei 67% bzw. 60% der Oropharynxtumoren stimmten das CT- bzw. MRT-TNM-Tumorstaging mit der Klinik überein. Bei den Mundhöhlentumoren waren die klinischen TNM-Stadien in 50% bzw. 43% mit den CT- bzw. MRT-Befunden identisch. Beim Lymphknotenstaging war die Fehlerhäufigkeit bei der MRT mit 27% etwas höher als bei der Computertomographie mit 22%. Bei der Beurteilung der zervikalen Lymphknoten war die CT der MRT bezüglich der Sensitivität mit 78% gegenüber 69% überlegen. Schlussfolgerung: Aufgrund der Ergebnisse ergeben sich eindeutige Indikationen zur MRT- und CT-Untersuchung. Das primäre präoperative Screening und die posttherapeutische Nachsorge sollten durch CT beurteilt werden ebenso wie die Lymphknotendiagnostik im Halsbereich. Bei speziellen Fragestellungen, wie z. B. bezüglich der Periost- und Knocheninfiltration, ist die MRT eine ergänzende Untersuchung des 2. Schritts.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 89
    ISSN: 1434-0879
    Keywords: Key words Kidney ; Ureter ; Urinary obstruction ; Hydronephrosis ; Hyperoxaluria ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Hyperoxaluria is a well-known cause of renal stone disease and in vitro studies have shown that oxalate crystals have a stimulatory effect on apoptosis of renal tubular epithelial cells. Total and partial ureteral obstruction also have an accelerating effect on apoptosis of renal tubular epithelial cells. The aim of the present study was to investigate the apoptotic effect of unilateral ureteral obstruction in the presence of hyperoxaluria on the rat kidney. Twenty-eight male Wistar rats were divided into four groups, with seven rats in each. The groups were named G1 (control), G2 (hyperoxaluric), G3 (obstructive) and G4 (hyperoxaluric + obstructive). G2 and G4 rats were given 1% ethylene glycol (a precursor for oxalates) in their drinking water. G1 and G2 rats underwent sham operation, while left proximal ureteral ligation with a 5-zero silk suture was performed on G3 and G4 animals. The rats were sacrificed 2 weeks after the operation; left nephrectomy was then performed. We searched for the apoptotic cells by direct immuno-peroxidase detection of digoxigenin-labeled genomic DNA. The mean ± SD values of the apoptotic cell count was 0.86 ± 0.90 in G1 and 4.33 ± 3.81 in G2. The values for G3 and G4 were 30.17 ± 16.85 and 302.67 ± 184.45, respectively. We found a statistically significant difference between all groups (P 〈 0.001). When compared with the control group (G1), the mean apoptotic cell count was fivefold that of G2 and 35- and 351-fold those of G3 and G4, respectively. Our study demonstrated that hyperoxaluria with complete ureteral obstruction induces an excessive level of apoptosis, which is responsible for renal damage, and that ureteral obstruction is a more important factor for apoptosis than hyperoxaluria. Considering these data, we also believe that research studies for medical preventive measures must be considered for patients with ureteral obstruction and/or hyperoxaluria.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 90
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 99 (2000), S. 402-408 
    ISSN: 1432-0533
    Keywords: Key words Ageing ; Dog brain ; Apoptosis ; DNA ¶fragmentation ; TUNEL method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Neuronal DNA fragmentation, as revealed with the method of in situ end-labeling of nuclear DNA fragmentation (TUNEL), has been reported in both the canine and human brains in normal ageing, and in some human age-related neurodegenerative diseases. These results have suggested that apoptosis plays an important role in age-related neuronal loss. It is not clear, however, whether the TUNEL method is highly specific for apoptosis, as DNA fragmentation also occurs in the late stages o necrosis. In this study we have examined 27 dogs aged from ¶8 to 18 years, to investigate the occurrence of nuclear DNA fragmentation. An autolysis index based on current histological criteria was assigned to each animal to evaluate the effects of autolysis on nuclear DNA integrity. Our results have shown that neuronal nuclear DNA fragmentation is frequent in aged dogs, although it is not accompanied by apoptotic morphology. Yet, a positive relation between TUNEL labelling and the degree of tissue autolysis was observed. In contrast, no TUNEL labelling was detected in young control dogs despite autolysis indices being similar to those in aged dogs. Taken together, these results suggest that neuronal nuclear DNA fragmentation is an age-related phenomenon, not due to apoptosis, whenever other factors render neuronal DNA more susceptible to autolytic fragmentation. We confirm the effect of autolysis in a subpopulation of neurons in the aged canine brain, inducing nuclear DNA fragmentation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 91
    ISSN: 1432-0533
    Keywords: Key words Cerebellar selective injury ; Acrylamide ; Granule cell degeneration ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Oral administration of N-[4-(3-ethoxy-2-hydropropoxy)phenyl] acrylamide (EHA) induced selective granule cell destruction in the granular layer of the cerebellar cortex together with neurological signs, such as delayed righting reflex, gait or truncal ataxia, and convulsion. Neuropathologically, it caused multifocal granule cell destruction with nuclear pyknosis and spongiosis of the neuropile in the granular layer. Other neurons, including Purkinje cells, were spared. Ultrastructurally, damaged granule cells showed aggregation of nuclear chromatin and cytoplasmic edema, but cytoplasmic organelles were preserved. The brain uptake index of 14C-labeled EHA was similar to that of H2O. When EHA was added to rat cerebellar tissue cultures, only the granule cells showed nuclear pyknosis, aggregation of nuclear chromatin, and karyorrhexis with cytoplasmic swelling. These granule cells were positive for DNA fragmentation by the TUNEL method. These results suggest that EHA permeates the blood vessel wall and directly affects the cerebellar granule cells, resulting in selective granule cell apoptosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 92
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 99 (2000), S. 317-320 
    ISSN: 1432-0533
    Keywords: Key words Perineuritis ; Neuropathy ; Nerve biopsy ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 71-year-old man presented a 6-month history of progressive paresthesia of all four limbs. Sural nerve biopsy specimens showed dense mononuclear infiltrates in the perineurium and subperineurium, indicating sensory perineuritis. One section revealed disruption of the perineurial barrier. Perforin and granzyme B were present in the infiltrates, and apoptosis of perineurial cells was indicated by a terminal deoxynucleotidyl-transferase-mediated dUTP-digoxigenin nick end-labeling (TUNEL) method. These findings suggest T cell-mediated apoptosis of the perineurium and nerve injury caused by perineurial damage.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 93
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 292 (2000), S. 522-523 
    ISSN: 1432-069X
    Keywords: Key words Serum soluble Fas ; Systemic sclerosis ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 94
    ISSN: 1432-069X
    Keywords: Key words Docosahexaenoic acid (DHA) ; 15-hydroxyeicosatrienoic acid (15-HETrE) ; AP-1 ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The purpose of this study was to ascertain whether the antiproliferative effect of 15-hydroxyeicosatrienoic acid (15-HETrE), a monohydroxy fatty acid generated from dihomo-Á-linolenic acid, in an experimentally induced guinea pig hyperproliferative model involves alterations in nuclear transcription factor (AP-1) and apoptosis. The topical application of docosahexaenoic acid (DHA) to normal guinea pig skin elicited a severe hyperplasia which was accompanied by the suppression of AP-1 expression in a time-dependent manner. Since apoptosis is pivotal in tissue turnover, the expression of two apoptotic proteins (Bcl-2 and caspase-3) after DHA and 15-HETrE treatment was explored. DHA-induced hyperproliferation enhanced the expression of Bcl-2 (an antiapoptotic protein) but inhibited the expression of caspase-3 (an apoptotic protein). 15-HETrE, on the other hand, reversed the DHA-induced epidermal hyperplasia, and upregulated epidermal AP-1 expression. These events paralleled the suppression of Bcl-2 and the elevation of caspase-3. Taken together, these results suggest that the antiproliferative effect of 15-HETrE may, at least in part, be via the modulation of AP-1 and apoptosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 95
    ISSN: 1432-0584
    Keywords: Nitric oxide ; Bone marrow ; Proliferation ; Apoptosis ; Sepsis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: α , interferon γ and interleukin-1β for 48 h. The basal proliferation rate of the cells remained unchanged, but granulocyte–macrophage colony stimulating factor-induced proliferation was suppressed and the percentage of apoptotic cells significantly raised. Levels of nitrite in the culture supernatants were inversely correlated with the suppression of proliferation, but directly correlated with apoptosis. The NO synthesis inhibitor N-methyl-arginine inhibited the suppression of proliferation as well as the induction of apoptosis and NO synthesis. Our results indicate that NO is a negative feedback regulator of cell turnover in sepsis, which limits growth-factor-induced proliferation and induces apoptosis of bone marrow cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 96
    ISSN: 1432-0568
    Keywords: Key words Mouse ; Gene expression ; Insulin-like growth factor (IGF) ; IGF binding protein (IGFBP) ; Hypodactyly (Hd) ; Limb bud ; Apoptosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Insulin-like growth factor-I (IGF-I) mediated signalling has been implicated to be of significant importance during vertebrate embryonic development. IGF-I signalling has also been shown to be modulated by a number of IGF binding proteins that are thought to act as either agonists or antagonists of IGF activity. IGF-I has been implicated in a number of cellular processes, including cell division and programmed cell death (apoptosis). We have used the mouse mutant Hypodactyly (Hd) as a tool to determine the role of IGF-I and two key IGF binding proteins (IGFBP-2 and IGFBP-5) during embryonic development. The Hd mutant is a good model with which to study developmental cascades, since it has a distinct phenotype in the limb where cellular and molecular circuits have been thoroughly investigated. The distinctive pointed limb buds observed in Hd mutant embryos have been shown to be the result of a massive increase in apoptosis. We show that all three genes, IGF-1, IGFBP-2 and IGFBP-5, display restricted expression patterns during limb development. Indeed, IGFBP-5 shows a remarkable similarity to the expression of Engrailed-1, which is the vertebrate homologue of the Drosophila selector gene Engrailed. We show that there is downregulation in the expression of IGFBP-2 in the entire apical ectodermal ridge (AER) in homozygous Hd/Hd limb buds, whereas IGFBP-5 is downregulated in specific regions in the mutant AER. IGF-I expression is downregulated in Hd limb buds in regions undergoing high levels of cell death, consistent with its proposed role as an anti-apoptotic factor, while IGFBP-5 is found at higher levels in regions of cell death, consistent with reports of its association with apoptosis in adult tissues. We propose that these three components of the IGF axis could be involved in the manifestation of the mutant phenotype in Hypodactyly, and that this is probably a result of their ability to regulate cell survival and cell death.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 97
    ISSN: 1432-069X
    Keywords: Keywords HSP70 ; Human melanoma cells ; Ultraviolet B ; Apoptosis ; Caspase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The heat shock response is a highly conserved reaction common to all cells and organisms. It has been reported that hyperthermic treatment can induce the expression of the heat shock protein (HSP) and can protect cells from ultraviolet (UV) B radiation. In this study, we evaluated the effects of induced HSP70 on resistance to UV radiation. G361 amelanotic human melanoma cells were irradiated with increasing doses of UVB. UVB irradiation caused apoptotic cell death in these cells. Following transfection with MFG.hsp70.puro plasmid, the expression of HSP70 was determined. Compared to control vector-transfected cells, hsp70-transfected cells showed significantly elevated levels of HSP70 and were highly resistant to UVB irradiation. In order to investigate the effects of HSP70 on the apoptotic pathway, the changes in caspase-3 and PARP were analyzed. Following UVB irradiation, activation of caspase-3 and cleavage of PARP were observed in control vector-transfected cells, and the changes in these molecules were inhibited in the hsp70-transfected cells. These results suggest that UVB-induced apoptosis of melanoma cells is accompanied by caspase-3 activation and PARP cleavage, which can be prevented by an overexpression of HSP70.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 98
    ISSN: 1432-069X
    Keywords: Key words Granuloma annulare ; Cytokine ; Apoptosis ; Lymphocytes ; Macrophages
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Granuloma annulare, a prototype noninfectious granulomatous dermatitis, is morphologically characterized by a necrobiotic core surrounded by a cellular infiltrate. Because of many morphological similarities to tuberculosis, granuloma annulare has been suggested to represent a delayed-type hypersensitivity (Th1) reaction in the course of which inflammatory cells elicit matrix degradation. In the present study we (1) investigated the expression of interferon-Á as the most important Th1-associated cytokine, (2) sought in situ evidence for the coexpression of the proinflammatory cytokine tumor necrosis factor-· and cytokine-regulated matrix metalloproteinases 2 (gelatinase A) and 9 (gelatinase B), and (3) sought to determine whether shrunken cells seen within necrobiotic areas of granuloma annulare are apoptotic cells. In situ hybridization combined with immunofluorescence showed that large numbers of infiltrating CD3+ lymphocytes express interferon-Á. Application of catalyzed signal amplification in immunodetection revealed that the vast majority of CD3+ lymphocytes and CD68+ macrophages contained tumor necrosis factor-·. Immunohistochemistry demonstrated that macrophages producing tumor necrosis factor-· coexpress matrix metalloproteinases 2 and 9. In situ end-labeling combined with immunofluorescence detected few apoptotic T cells in perivascular regions and numerous apoptotic macrophages within necrobiotic areas. These results suggest that in granuloma annulare interferon-Á+ Th-1 lymphocytes may cause a delayed-type hypersensitivity reaction whereby macrophages are differentiated to aggressive effector cells expressing tumor necrosis factor-α and matrix metalloproteinases. In parallel, activation-induced apoptosis in lymphocytes and macrophages may serve to restrict the destructive potential of the inflammatory cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 99
    ISSN: 1432-069X
    Keywords: Key words Ceramide ; 1α,25-Dihydroxyvitamin D3 ; TNFα ; Apoptosis ; Bcl-2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract During the last few years increasing evidence has shown that sphingolipid metabolites are highly bioactive compounds that play important roles in cellular regulation. The induction of ceramide signalling in primary human keratinocytes and HaCaT keratinocytes has recently been demonstrated using 1·,25-dihydroxyvitamin D3. The data obtained indicate that approximately one-third of the proapoptotic effect of 1·,25-dihydroxyvitamin D3 is mediated by an intracellular ceramide increase induced via tumor necrosis factor · expression and autocrine stimulation of sphingomyelin hydrolysis. In the present study the role of bcl-2 in this process was investigated. HaCaT keratinocytes were transfected with bcl-2 and the effects of C2-ceramide, tumor necrosis factor · and 1·,25-dihydroxyvitamin D3 on HaCaT keratinocytes stably overexpressing bcl-2 were determined. Apoptosis was measured by detection of soluble DNA-histone complexes using the ELISA technique. In situ analysis of apoptotic cells was also carried out by detecting phosphatidylserine flip using the annexin V method and by detecting DNA fragmentation using the TUNEL assay. The results obtained showed that apoptosis induced by C2-ceramide, tumor necrosis factor · or 1·,25-dihydroxyvitamin D3 occurred in a vector-transfected clone but not in a bcl-2-transfected HaCaT clone. This indicates the important role of bcl-2 in the regulation of ceramide-mediated signalling pathways in human keratinocytes and supports the involvement of ceramide as a signalling molecule in 1α,25-dihydroxyvitamin D3-induced biological responses.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 100
    ISSN: 1432-0584
    Keywords: Key words Down syndrome ; Transient abnormal myelopoiesis ; Apoptosis ; bcl-2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Transient abnormal myelopoiesis (TAM) is a haematological complication found in Down syndrome. To determine the mechanisms of sustained proliferation of TAM cells, we studied the expression of apoptosis-related proteins, such as bcl-2, Fas (APO-1/CD95) and p-53, in peripheral blood cells from a new-born infant with Down syndrome and TAM. Using flow cytometry, peripheral blood mononuclear cells (PBMCs), consisting mostly of blast cells, showed marked expression of bcl-2 protein but not of Fas or p-53 products. DNA gel electrophoresis of PBMCs, cultured in the absence of serum factors, revealed no marked fragmentation. Our findings suggest that bcl-2 overexpression may be associated with prolonged cell survival of TAM cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...