Primary malignant melanoma of the urinary bladder associated with widespread metastases.

Malignant melanoma in the urinary tract is very rare. Tumours found in the urinary bladder are usually metastatic. Some ten cases of primary malignant melanoma have been described in the literature, and in only a few of those has a primary bladder melanoma with many distant metastases and rapid fatal outcome been reported. For the first time in Finland, we present a case of primary malignant bladder melanoma associated with widespread metastases.