Abstract
A 87-year-old woman was admitted to our hospital to undergo treatment for melena, anal tumor and breast tumor. Endoscopy revealed a pedunculated and elastic soft tumor with blown, redness and black color, 2 cm in size, in the anorectal portion, suggestive of anorectal malignant melanoma. No metastatic lesion was found. Local excision of the anorectal tumor and mammarectomy were performed. Pathological examination of the resected specimen revealed anorectal malignant melanotic melanoma limited to the mucosa with lymphangiotic invaion and cut end negative. Anorectal malignant melanoma limited to the mucosa was the forth case in Japan. The present case accompanied a breast cancer at the same time.
