De Novo Secondary Adenocarcinoma in the Colon Used as Urinary Diversion Not in Contact with the Fecal Stream: Systematic Review and Meta-analysis.

Background: A systematic review with a meta-analysis was performed to determine the prevalence and risk factors for secondary de novo adenocarcinoma in the colon used as a urinary diversion not exposed to the fecal stream.

Methods: The systematic review of the literature identified 47 patients with secondary adenocarcinoma in a colonic urinary diversion not exposed to the fecal stream.

Results: The diagnosis of secondary adenocarcinoma was determined due to the presence major local symptoms and because the cancer in half of the patients was detected at an advanced stage. Diagnosis at an earlier stage was associated with long-term cancer-free survival.

Conclusions: The authors concluded that cystoscopy-colonoscopy screening as suggested by the American Gastroenterology Society for the general population should be applied to patients who have colon urinary diversion not exposed to the fecal stream. For patients with active high-grade inflammation, difficulty with self-catheterization, or symptoms, cystoscopy should be performed earlier. Resection of the tumor at an early stage offers better clinical outcomes with longer survival rates.