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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 343 (1977), S. 229-241 
    ISSN: 1435-2451
    Keywords: Colonic carcinoma ; Experimental colonic carcinoma ; Carcinoma of colostomies ; Late complications in rectal excision
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nach Anlage einer doppelläufigen Colostomie bei männlichen Wistar-Ratten entwickelten 48 überlebende Tiere nach 120–200 Tagen spontane Adenocarcinome am oralen Stoma. Zur Differenzierung der Bedeutung von Stuhlpassage und Vorlagerung wurde das durch doppelläufige Aszendostomie ausgeschaltete C descendens offen in die Bauchhaut eingenäht. Nach 120 Tagen waren sowohl am oralen Schenkel der Aszendostomie als auch am vorgelagerten C. descendens regelmäßige Adenocarcinome entstanden. Die derart exponierte Colonschleimhaut disponiert also zu maligner Entartung. Die Befunde erklären im Sinne der Syncarcinogenese die bevorzugte Lokalisation systemisch induzierter experimenteller Coloncarcinome an Colostomien. Analoge Beobachtungen können an menschlichen Kunstaftern gemacht werden. Die relative Seltenheit eines menschlichen Ap-Carcinoms sui generis ist angesichts mehrjähriger Indukationszeiten auf das hohe durchschnittliche Lebensalter zum Zeitpunkt der Ap-Anlage zurückzuführen.
    Notes: Summary 48 surving male Wistar rats, which achieved a double loop colostomy at the descending colon, developed spontaneous adeno-carcinomas at the proximal orifice of the stoma within 120–200 days. To differentiate the importance of fecal passage and eversion of the colon, the descending colon was separated from the fecal stream by a colostomy at the ascending colon, splitted longitudinally and inserted in the abdominal wall. Adeno-carcinoma arose in both positions, mainly within 120 days. Colonic mucosa, thus exposed, predominates to maligne transformation. The preferred development of cancer at colostomies, as seen in systemically induced colonic cancer, is therefore explained to be of syncarcinogenic type. Similar lesions were found at human colostomies. The rareness of original carcinoma at human colostomies is caused by a more-years time of induction in relation to the high average age of patients getting a colostomy. In fact we regard this type of cancer as a biological phenomena comparable to the cancer of the gastric stump.
    Type of Medium: Electronic Resource
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