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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 37 (1994), S. 540-545 
    ISSN: 1530-0358
    Keywords: Proliferative activity ; Colonic anastomoses ; Statin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: One theory of anastomotic recurrence in large bowel carcinoma is that epithelial hyperplasia at the suture line causes metachronous carcinoma. METHODS: S44, a monoclonal antibody directed against statin, a nuclear protein expressed in quiescent cells, was used to determine whether the anastomosis represents an area with a high proliferation rate. During follow-up colonoscopic examination of patients who had undergone previous resection for colorectal carcinoma, biopsies were taken from the anastomotic site and from the mucosa 10 to 15 cm from the anastomosis. One side of 10 well-oriented crypts was counted for each patient with the number of nuclei positive for statin being determined by the presence of dark brown reaction product. RESULTS: The average percentages of statin-positive cells varied between 19.4 and 44.4 (average, 31.3±6.5) for the normal mucosa and 22.8 to 35.1 (average, 2998±3.67) for the anastomotic mucosa. The differences were not significant. There were no differences between those patients in whom the postoperative time elapsed was two years or less and those greater than two years. CONCLUSION: This study is unique in that the proliferative activity at the site of colonic anastomosis was determined in a clinical setting, and patients in which the anastomoses were created anywhere from 1 to 14 years earlier were included. Using S44 as a marker, this study does not support the theory that suture line recurrence is a result of an enhanced proliferation rate.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 38 (1995), S. 1026-1032 
    ISSN: 1530-0358
    Keywords: Proliferative activity ; Anastomosis ; Suture material
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract BACKGROUND: Suture line recurrence continues to be an important cause of failure following curative resection for colorectal carcinoma. Our aim was to determine whether the nature of the suture material used affected the proliferative activity of colonic crypt cells at the anastomosis. METHODS AND MATERIALS: Sprague-Dawley rats were randomized into one control and three experimental groups. In each experimental group the proximal 2 cm of rectum were resected and anastomoses constructed with titanium clips, interrupted 6-0 VicrylTM (Ethicon, Inc., Somerville, NJ), and interrupted 6-0 silk. Control animals had a sham operation. One-quarter of each group of rats were killed at 14, 30, 60, and 90 days. Each animal received intraperitoneal tritiated thymidine 30 minutes before death. Each anastomosis was harvested, and longitudinally oriented crypts were analyzed for the total number and position of labeled cells at five equal distances from the anastomosis. Random crypts were studied in the control group. RESULTS: Labeling indices were increased in almost all experimental groups at days 14, 30, 60, and 90. There were no persistent, statistically significant differences in labeling indices among the various suture materials. CONCLUSION: The type of suture material used did not significantly affect the proliferative rate in this animal model.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 38 (1995), S. 462-467 
    ISSN: 1530-0358
    Keywords: Colon carcinoma ; Cell cycle genes ; Mucosa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract BACKGROUND: One of the main concerns in colon carcinoma therapy is local recurrence of the malignancy at the site of resection. Previous studies have shown that morphologically normal-appearing mucosa adjacent to colon carcinoma is different from mucosa distant from carcinoma. Mucosa adjacent to a carcinoma is characterized by crypt lengthening, cell hypertrophy, and change in production of mucopolysaccharides from sulfomucin in normal mucosa to sialomucins in carcinomas and adjacent mucosa. Recently there have been reports suggesting that there is an upward extension of the proliferative compartment in colonic crypts of this adjacent mucosa. METHODS: Immunoblot analysis using antibodies to retinoblastoma, statin, c-Fos, c-Jun, and Cdc-2 proteins was used for our study on the expression of early cell cycle genes in carcinoma and its adjacent mucosa. In all, 15 tissue samples obtained from patients with colon carcinoma were analyzed. Tissue specimens were collected and immediately dissected as tumor, 0 to 1, 1 to 2, 2 to 3, 3 to 4, and 4 to 5 cm from the primary lesion. Dissected pieces were homogenized separately and subjected to immunoblot analysis. RESULTS: We found upregulation of c-Fos, c-Jun, and Cdc-2 expression in carcinoma and adjacent mucosa up to 4 cm from the edge of the carcinoma. The phosphorylated form of retinoblastoma is present in the carcinoma as well as in adjacent mucosa up to 4 cm from the margin of the carcinoma. Furthermore, we observed that the level of statin, a nonproliferation-specific nuclear protein, is very low in the primary lesion and in adjacent mucosa up to 3 cm. CONCLUSIONS: These results indicate that adjacent tissue up to 3 to 4 cm from the carcinoma has elevated levels of expression for cell cycle traverse-associated genes and down-regulation of nonproliferation-specific gene expressions such as statin. This imbalance indicates that within 3 to 4 cm from the edge of the carcinoma, colonic epithelial cells are already abnormal and may be in the hyperproliferative and preneoplastic state, susceptible to further steps leading to eventual malignant transformation.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 38 (1995), S. 907-911 
    ISSN: 1530-0358
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 37 (1994), S. 760-765 
    ISSN: 1530-0358
    Keywords: Fistula-in-ano ; Crohn's disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The operative management of patients with fistula-in-ano in the presence of Crohn's disease has been controversial. Our aim was to review the results of operative treatment in this clinical setting. METHODS: Twenty-eight such patients treated between 1976 and 1990 were reviewed. The duration of local symptoms, location of the Crohn's disease, medications, and previous operations were noted. An effort was made to classify the fistula-in-ano according to Parks' classification, but many fistulas were complicated and did not neatly fit into one of the described categories (intersphincteric 9, transsphincteric 10, complex 9). Patients underwent fistulotomy (three with a seton). RESULTS: Complete healing was achieved in 71.4 percent of cases with an average healing time of 3.5 months (range, 3 weeks-26 months). With an average follow-up of 71 months (range, 12 months-14 years), postoperative function was good in 20 (71.5 percent) patients. Of the remaining eight patients, five ultimately underwent total proctocolectomy because of the severity of their colorectal disease, one patient developed alteration of continence, and two patients developed stenosis. There were two recurrences, (one at nine months and one at six years). CONCLUSION: Operative treatment should be offered to selected patients with fistula-in-ano in the presence of Crohn's disease.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 40 (1997), S. 229-233 
    ISSN: 1530-0358
    Keywords: Clinical manifestations ; Natural history ; Fissure-in-ano
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: This study was designed to reassess clinical manifestations of fissure-in-ano, in particular, the frequency of constipation and rate of response to medical management. METHODS: Records of 876 patients with fissure-in-ano seen between February 1975 and December 1993 were reviewed. Information gathered included age, gender, site, symptoms, bowel habits, associated anorectal problems, response, failure, and recurrence rates. RESULTS: There were 439 women (51.1 percent) and 437 men (49.9 percent); mean age was 39.9 (range, 13.5–95) years. The fissure was located in the posterior mid line in 644 patients (73.5 percent), the anterior mid line in 144 patients (16.4 percent), both in 23 patients (2.6 percent), and only tenderness documented in 65 patients (7.4 percent). The fissure was located in the anterior midline in 12.6 percent of women and 7.7 percent of men. Dominant presenting symptoms included pain in 90.8 percent and bleeding in 71.4 percent of patients. Infrequent hard bowel movements (≥3 days) occurred in only 13.8 percent of patients. Mean follow-up was 26 (range, 0.5–215) months. A total of 44.7 percent of patients responded to nonoperative therapy, 60 percent of them in the first two months; of these, 18.6 percent developed recurrent symptoms. Of the latter group, 60 percent responded to further medical therapy, and 20 percent underwent a lateral internal sphincterotomy. Of the patients who initially did not respond to medical treatment (50.5 percent), lateral internal sphincterotomy was recommended. CONCLUSION: Anterior fissures are much more common in both men and women than previously reported, and constipation and hard bowel movement are not universally present in patients with fissure-in-ano.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 40 (1997), S. 322-325 
    ISSN: 1530-0358
    Keywords: Ki67 ; Proliferative activity ; Colorectal carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: In the search for a prognostic discriminant, Ki67 immunoreactivity of colorectal carcinoma was used to see whether this marker correlated with clinical and pathologic parameters and the ultimate prognosis of the patient. METHODS: Fresh specimens from 30 surgically resected adenocarcinomas were obtained and frozen in liquid nitrogen. Slides were immunohistochemically stained with Ki67. Ten randomly chosen fields were examined, and 1,000 nuclei per specimen were counted. The percent positive stained nuclei determined the Ki67 score. Correlation was made with the parameters of Dukes stage, location within the colon, size of malignancy, gender, age, and survival. RESULTS: There was a positive correlation of the Ki67 score for patients with metastatic disease, but no correlation was found to Dukes B and C cases. There was no correlation between Ki67 immunoreactivity and size or location of lesion, patient's age, patient's gender, or whether patient died of disease or developed a recurrence compared with those who survived five years disease-free. CONCLUSION: Ki67 immunoreactivity could not be correlated with clinical and pathologic parameters except for metastatic disease in this study and was of limited use as a prognostic discriminant.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 34 (1991), S. 249-259 
    ISSN: 1530-0358
    Keywords: Nuclear shape ; Prognostic discriminant ; Colorectal carcinoma ; Image analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In search for a more reliable prognostic discriminant, a retrospective analysis of 100 cases of colorectal carcinoma having undergone curative resection and followed for at least 5 years were assessed by nuclear morphometry. Each case was staged according to the Dukes' classification as well as graded histologically. For all patients in this series, the perimeter, area, and nuclear shape factor of 50 interphase nuclei were determined for each carcinoma. The information was obtained through the use of an image analysis system by tracing the nuclear profiles (magnification 1000×) as digitized on a video screen. The nuclear shape factor was defined as the degree of circularity of the nucleus, a perfect circle recorded as 1.0. A nuclear shape factor greater than 0.84 was associated with poor outcome. Multiple regression models showed that the single nuclear parameter of the shape factor was the most highly significant predictor of survival (P 〈0.0001). This variable remained highly significant even when corrected for sex, age, histologic grade, and Dukes' classification. These findings indicate that a nuclear shape factor ≥0.84 as determined by nuclear morphometry is an independent morphometric nuclear variable of great importance in the prognosis of large bowel carcinoma.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 40 (1997), S. 15-24 
    ISSN: 1530-0358
    Keywords: Incidence ; Pattern ; Recurrence ; Colorectal carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: This study was designed to determine incidence and patterns of recurrence after curative resection of colorectal carcinoma and to determine which variables are significant in predicting outcome. METHOD: A retrospective review of 524 patients operated on by one surgeon from 1975 to 1992 was conducted. Variables recorded included age, gender, location, gross morphology, histology, stage of each primary and evidence of perforation and direct extension at time of original operation. Overall survival and pattern of recurrence were documented. RESULTS: Overall recurrence rate was 27.9 percent. Anastomotic recurrence rate was 11.7 percent. Anastomotic recurrences were higher for rectal than colon lesions (20.3 vs. 6.2 percent;P = 0.001). Distant metastases developed in 14.4 percent of patients, 13.9 percent for colon carcinoma and 15.5 percent for rectal carcinoma. Average time for anastomotic recurrence was 16.2 months vs. 22.9 months for distant disease. T1,2,N0,M0 lesions had a 17.6 percent recurrence rate, T3,N0,M0 was 23.4 percent, and T1,2,3,N1,M0 was 43.7 percent (P =.001). Patients who did not undergo any intervention after diagnosis of recurrence survived an average of 28 months. Those who received palliative treatment survived an average of 39 months. Twenty-four percent of patients had reresection for cure, and 47 percent of these patients were alive at a mean of 80 months; those who died of their disease did so at an average of 53 months. Positive predictive factors for recurrence include site of lesion (rectum vs. colon), stage, invasion of contiguous organs, and presence of perforation. Age, gender, degree of differentiation, mucin secretion, and gross morphology were not found to be predictive factors in this study. CONCLUSIONS: Recurrence after resection for rectal carcinoma is higher than after colon carcinoma. In those patients in whom reresection is possible, up to 50 percent may have long-term survival. Understanding patterns of recurrence and features that predispose to them may guide the physician in aggressive but more selective adjuvant therapy and recommendations for targeted surveillance in follow-up.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1530-0358
    Keywords: Proliferative adjacent mucosa ; Colon carcinoma ; Statin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The field change is one hypothesis concerning the development of colorectal carcinoma. Removal of a carcinoma without its entire surrounding altered mucosa may result in the development of a recurrence. S44, a monoclonal antibody directed against statin, a nuclear protein expressed in nonproliferating cells in either a quiescent or senescent state, was used to determine the rate of cell growth in colorectal mucosa at different distances from carcinomas. The specimens of 18 patients undergoing resection of a colorectal carcinoma were immediately opened after operation, and strips of mucosa were taken at distances of 1 cm, 5 cm, and 10 cm from the carcinoma. For each location, 10 longitudinally oriented crypts were evaluated for statin-positive cells identified by the presence of a dark brown peroxidase-conjugated antibody reaction product. The average percentage of statin-positive cells per crypt was significantly lower at a 1-cm distance from the carcinoma compared with the mucosa located 5 and 10 cm from the carcinoma (20.89±4.33 at 1 cm, 32.41±5.27 at 5 cm, and 34.23±6.45 at 10 cm). None of the calculated parameters showed any significant difference between the 5-cm and 10-cm locations. The fact that the proliferation rate of the mucosal cells returns to the normal level at 5 cm from the margin of the carcinoma suggests that cells located within this distance still retain proliferative potential even though they are morphologically indistinguishable from their normal counterparts. We conclude that failure to remove this transitional, potentially proliferative mucosa may result in subsequent development of anastomotic or perianastomotic recurrences.
    Type of Medium: Electronic Resource
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