Amelanotic malignant melanoma of the perineum: a case report.

The case of a patient diagnosed and surgically treated for amelanotic malignant melanoma of the perineum, accompanied by several local relapses, metastases to iliac-femoral lymph nodes, and distant metastases to both lungs is presented. Survival, up to date, equals 12 years. Amelanotic malignant melanomas are very rare tumors. Perineal and perianal localization of these tumors is especially rare. References cite about 500 cases with survival limited to between six months and one year after diagnosis..