[A case of malignant melanoma of the penis].

An 83-year-old male presented in October, 1988, with pigmented tumor lesions on the penis. The main tumor mass accompanied with necrotic bleeding, measuring 5 cm in diameter was located on the fore skin and glans penis. On the proximal shaft of the penis, there were three other black tumors, measuring from 0.5 to 3 cm in diameter. The distal urethra of the penis was clinically involved in the tumor mass and bilateral inguinal lymph nodes were palpable. Chest X-ray and liver scan both revealed multiple metastases. Tumor biopsy confirmed malignant melanoma. Phallectomy and bilateral inguinal lymph node biopsies were performed in October, 1988. Pathological findings revealed that a malignant melanoma had developed from the fore skin and glans penis, extended into the penile urethra and metastasized to bilateral inguinal lymph nodes. The patient gradually deteriorated in general condition and died of cancer 28 days later. The prognosis of malignant melanoma of the penis seems to be extremely poor.