Mesonephric adenocarcinoma of bladder.

Mesonephric adenocarcinoma of the bladder is an extremely rare neoplasm. The typical location in the bladder neck and trigone tends to confirm that this neoplasm probably derives from a remanent of the mesonephric duct. This case is the fourth described in the literature. The patient underwent total cystectomy with ureterosigmoidostomy and is still apparently tumor free 7 years after operation.