Sigmoid Colon Adenocarcinoma at the site of prior, now defunctionalized, ureterosigmoidostomy for bladder exstrophy.

Patients with a history of ureterosigmoidostomy are at an increased risk of rectosigmoid adenocarcinoma. The cancer can occur many decades after the diversion, even if there was conversion to ileal urinary conduit. These patients may still be considered as high-risk individuals and screened for colorectal cancer accordingly.