Adenocarcinoma developing in a rectosigmoid conduit used for urinary diversion. Report of a case.

Adenocarcinoma of the colon developing at or about the sites of ureterosigmoid anastomoses for urinary diversion has been documented in the literature. A case report is presented that illustrates that a carcinoma can develop in a large bowel urinary conduit not exposed to the fecal stream. Colonic bladders are being used with increasing frequency, making observation for this delayed complication necessary. How this neoplastic transformation might occur is discussed. Suggestions for the management of this problem and guidelines for follow-up are also presented.