[Primary malignant melanoma of the female urethra: a case report].

A 76-year-old woman visited us with the chief complaint of a urethral mass on September 11, 1984. There was a thumb-sized, brownish and painless mass in the posterior wall of the urethra. Although excretory urogram revealed nothing remarkable, CT scan suggested metastasis of retroperitoneal lymph nodes. Biopsy of the urethral mass revealed malignant melanoma. She was treated with combined chemotherapy of dimethyltriazenoimidazole carboxamide, peplomycin, and cis-diamine-dichloride platinum, but died of respiratory insufficiency on January 6, 1985. Thirteen cases of primary malignant melanoma of the female urethra, including our own, have been reported in the Japanese literature.