Late malignant change in an ileal conduit.

Around 3000 bowel segment transpositions are performed in the UK each year and although malignancy is well-recognized following ureterosigmoidostomy, reports of similar changes in ileal conduits are sparse. We report a case of ileal adenocarcinoma in a 67-year-old lady some 49 years after ileal conduit, demonstrating previously unassociated histopathological features similar to those seen in collagenous colitis.