Nephrogenic adenoma in a urethral diverticulum. A case report.

A nephrogenic adenoma was identified histologically in the excised specimen of a urethral diverticulum. Urethral diverticulum is a relatively common disorder of the female lower urinary tract, and nephrogenic adenoma is an extremely rare finding: this is the 13th reported case of this association. Of clinical importance is the close histopathologic resemblance of nephrogenic adenoma to clear cell adenocarcinoma. Nephrogenic adenoma is a benign metaplastic change of the urothelium in response to repair.