Mesonephric adenocarcinoma of bladder.

Mesonephric adenocarcinoma of the bladder is an unusual tumor, with its origin unclear. Metaplasia of urothelium and anaplasia of embryonic cell rests appear to be the cause of this tumor. A patient is described with mesonephric adenocarcinoma, who is now apparently free of disease two years after a radical cystectomy and ileal conduit. This represents the second such report in the literature.