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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 39 (1996), S. 636-642 
    ISSN: 1530-0358
    Keywords: Three-dimensional imaging ; Endorectal ultrasonography ; Rectal cancer ; Stenosis ; Preoperative staging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Preoperative staging of advanced carcinoma of the rectum by conventional endorectal ultrasonography is often impossible because of the presence of obstruction, which does not allow passage of the endoprobe. In a prospective Study, we investigated the value of three-dimensional endorectal ultrasonography for staging of obstructing rectal cancer. This technique permits examination of obstructing rectal tumors because scan planes can be chosen deliberately within a scanned volume. METHODS: Overall obstructing tumors not accessible for conventional endoprobes were found in 26 of 94 patients who were subjected to endorectal ultrasonography for staging of rectal cancer. Three-dimensional volume scanning was performed using a three-dimensional frontfire transducer or a three-dimensional bifocal multiplane transducer (7.5/10 MHz). Data of the three-dimensional scans were stored on a hard disk for subsequent evaluation with a combison 530 processor. RESULTS: Three-dimensional transrectal endosonography enabled visualization of local tumor spread in all 26 patients. In 18 patients, obstruction was caused by advanced primary rectal carcinoma. Endosonography accurately determined the tumor infiltration depth in three T2 tumors, eight T3 tumors, and three T4 tumors. Overall accuracy for assessment of infiltration depth was 78 percent. Accuracy for assessment of perirectal lymph node involvement was 75 percent. In eight patients, the obstruction was attributable to extramural regrowth of rectal cancer after surgery. Diameter of the lesions ranged between 3 and 6 cm. Although all lesions were clearly depicted by three-dimensional endosonography, only five lesions (62 percent) were detected by computed tomography. CONCLUSIONS: Three-dimensional endorectal ultrasonography provides previously unattainable scan planes and enables accurate staging of obstructing rectal tumors. This technique may improve therapy planning in advanced rectal cancer by selecting patients who require preoperative adjuvant therapy.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 39 (1996), S. 1373-1378 
    ISSN: 1530-0358
    Keywords: Threedimensional endosonography ; Transrectal biopsy ; Recurrence ; Rectal cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The value of endorectal ultrasonography for postoperative follow-up of rectal cancer is limited by the inability to distinguish recurrent malignancy from benign lesions,e.g., fibrotic tissue. This study was conducted to investigate the role of three-dimensional (3D) endosonography for evaluation and biopsy of recurrent rectal cancer. METHODS: Endorectal ultrasonography was performed in routine follow-up program after resection of rectal cancer. 3D volume scans were recorded using a bifocal multiplane 3D transducer (7.5/10 MHz) with a 100
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 19 (1995), S. 282-286 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Le cancer de l'anus est rare, représentant 1–2% de tous les cancers du tube digestif. En raison de cette rareté même, et parce que plusieurs modalités thérapeutiques ont déjà été proposées et évaluées, il est difficile d'établir une conduite à tenir standardisée. Pendant une assez longue période de temps, on a pensé que la chirurgie d'exérèse radicale était le chemin à suivre, et de nos jours encore, 30% des patients ont une amputation abdomino-périnéale. Cependant, des récidives ont été observées dans 20–40% des cas après une telle mutilation. D'autres modalités thérapeutiques ont été proposées dans le but de conserver la fonction sphinctérienne comprenant la radiothérapie externe ou interne, et la chimiothérapie. Pendant ces dernières années, on s'est beaucoup intéressé à l'association radiothérapie (50 Gy) et chimiothérapie (5-fluoracile + mitomycine C) qui, à présent, semble être la modalité la plus efficace en cas de cancer avancé. Avec cette association, on obtient un contrôle tumoral dans 60–80% des cas et il semble que cette modalité combinée améliore la durée de la survie sans maladie. En dépit de sa toxicité, on conseille la radiochimiothérapie comme modalité initiale pour la plupart des patients.
    Abstract: Resumen El cáncer anal es una rara entidad clinica que representa el 1–2% de todos los cánceres del tracto gastrointestinal. Debido a lo infreenente de esta neoplasia maligna, ha sido dificil establecer guías'de aceptación general para el tratamiento, aunque diversas modalidades terapéuticas han sido evaluadas. Por un largo tiempo la cirugia radical constituyó el tratamiento primario para todos los cánceres anales y todavía alrededor de 30% de los pacientes son sometidos a proctectomia abdominoperineal. Sin embargo, se registran tasas de recurrencia del orden de 20–40% luego de este procedimiento mutilante. Es por ello que en forma creciente se usan otras opciones de tratamiento, incluyendo la radioterapia, externa o intersticial, y la quinnioterpia, con la intención de conservar la función del esfinter. En los últimos affos se ha generado considerable interés en la terapia multimodal con irradiación (50Gy) y quimioterapia (5 fluoruracilo y mitomieina C). En el momento actual la radioquimioterapia parece ser la forma más eficaz de tratamiento en el cáncer anal avanzado. Se logra el control local-regional del tumor en 60–80% de los pacientes y hay evidencía de que la radioquimioterapia puede mejorar la sobrevida libre de enfermedad. A pesar de sa considerable toxicidad, la radioquimioterapia debe ser recomendada como el tratamiento primario en la mayoría de los casos.
    Notes: Abstract Anal cancer is a rare clinical entity which represents 1–2% of all gastrointestinal tract cancers. Due to the paucity of this malignancy it has been difficult to establish generally accepted guidelines for treatment, although various therapy modalities have been evaluated. For a long time radical surgery was the primary treatment for anal cancer and still about 30% of the patients undergo abdominoperineal rectotomy. However, recurrence rates of 20–40% have been observed after this multilating procedure. Therefore, other treatment options, including external or interstitial radiotherapy and chemotherapy, are used increasingly with the intention to preserve sphincter function. In the last years much interest has been addressed to multimodal therapy with radiation (50 Gy) and chemotherapy (5 fluouracil and mitomycin C). Presently radiochemotherapy appears to be the most efficient therapy in advanced anal cancer. Locoregional tumor control is obtained in 60–80% of the patients and there is evidence that radiochemotherapy can improve disease-free survival. Despite considerable toxicity, radiochemotherapy should be recommended as primary therapy to most patients.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 2 (1996), S. 393-400 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 5 (1999), S. 203-207 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Die einzige kurative Therapieoption beim Pankreaskarzinom besteht in der radikalen Resektion des Tumors. Das z.Z. sensitivste Verfahren zum Nachweis einer intraabdominellen Metastasierung stellt die Staging-Laparoskopie mit laparoskopischer Sonographie dar.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 3 (1997), S. 629-635 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Ein stadiengerechtes Vorgehen bei der Therapie des Ösophaguskarzinoms erfordert eine akkurate präoperative Diagnostik mit Risikoanalyse und einem umfassenden Staging. Nur auf dieser Basis kann entschieden werden, inwieweit ein operativer Eingriff möglich und als alleinige Maßnahme sinnvoll oder ob ein multimodales Vorgehen zu wählen ist.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 3 (1997), S. 653-659 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Aufgrund einer teilweise erheblichen Morbidität und funktionellen Mutilation sollte der resezierende Eingriff beim Ösophaguskarzinom solchen Patienten vorbehalten sein, die auf der einen Seite eine echte kurative Chance haben (R0-Resektion möglich), bei denen andererseits diese Heilung tatsächlich nur durch die Operation und nicht auch durch weniger eingreifende Maßnahmen erreicht werden kann. Besondere Aufmerksamkeit verlangt hier das durch Screening oder zufällig entdeckte Tis- oder frühe T1-Karzinom. Für die photodynamische Therapie ist inzwischen nachgewiesen, daß sie solche frühen Tumoren effizient mit sehr günstiger Langzeitprognose zerstören kann. Im symptomatischen Stadium diagnostizierte Ösophaguskarzinome sind häufig aufgrund der Tumorausdehnung oder von Fernmetastasen nicht mehr kurativ resezierbar. Unter dem palliativen Aspekt steht somit die Wiederherstellung der Ösophaguspassage im Vordergrund. Neue Therapieverfahren wie die photodynamische Therapie müssen ihre Effizienz und Vorteile in einem sorgfältigen Vergleich zu den etablierten Verfahren der endoskopisch-mechanischen Passagewiederherstellung, aber auch der externen und lokalen Strahlentherapie (ggf. in Kombination mit systemischer Chemotherapie) erst noch nachweisen.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 115 (1996), S. 38-42 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Forty patients (18–89 years old, mean 58 years) with comminuted intra-articular fractures of the distal radial end (AO-type C 2 or C 3) treated with external fixation could be followed for an average of 2.3 years. After 3 weeks, the distraction was released, and after another 3 weeks, the device was removed. Complications seen were one malunion, one radial shaft fracture caused by excentric drilling of a Schanz screw, one Sudeck atrophy, and one subcutaneous pin-track infection. Radial and ulnar deviations were reduced to 52% and 71% of the untreated wrist, whereas the range of motion in the other planes reached about 80% or more of the healthy side. In all, 82.5% of the patients showed good or excellent radiological and functional results. This study demonstrates that external fixation of distal radial C 2 and 3 fractures for 6 weeks results in good recovery for young patients and elderly patients with osteoporosis.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-0509
    Keywords: Key words: Endoscopic ultrasound—Three-dimensional imaging—Esophageal cancer—Tumor staging—Colorectal cancer.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: The purpose of the present study was to evaluate the feasibility of three-dimensional endoluminal ultrasound of gastrointestinal tumors. Methods: Sixteen patients with esophageal, gastric, or colorectal tumors underwent endoscopic ultrasound. Three-dimensional ultrasound data were obtained from multiple serial images of a miniprobe (360°, 12.5 MHz) and processed on a PC-based 3D workstation. Results: Adequate three-dimensional ultrasound scans were obtained in eight patients with esophageal cancer and five patients with colorectal cancer. Three-dimensional image processing enabled visualization of the data as a multiplanar display or as a life-like three-dimensional view. The availability of arbitrary scan planes improved the assessment of local tumor spread and the spatial relation of the tumor to relevant adjacent structures (e.g., major vessels). Three-dimensional presentations provided realistic views of the anatomy and facilitated the interpretation of the ultrasound images. Conclusions: Three-dimensional display and the ability to review endoluminal ultrasound data interactively may improve the staging of gastrointestinal tumors. These preliminary data encourage further evaluation of this technique.
    Type of Medium: Electronic Resource
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