恶性黑色素瘤常见于皮肤,原发于直肠、肛门者稀少,占直肠肛门多发恶性肿瘤中0.2～1.6％常见症状为出血、肛痛、里急后重属高度恶性肿瘤之一,预后差。现报告笔者遇见的原发性肛管恶性黑色素瘤一例。 曹××,男,62岁,患者于1982年9月2日因大便次数增多4～5次/日,呈淡红色粘便。按痢疾治疗无效。查体皮肤未见明显黑色素斑点,心肺 Malignant melanoma is common in the skin, and it is rare in the rectum and anus. It accounts for 0.2 to 1.6% of multiple malignant tumors of the rectum and anus. Common symptoms include bleeding, analgia, and tenesmus. One of the high-grade malignant tumors has a poor prognosis. I report a case of primary malignant melanoma of the anal canal. Cao × ×, male, 62 years old. On September 2, 1982, the patient’s bowel movements increased 4 to 5 times per day, showing pale red stickiness. Treatment by diarrhea is ineffective. No visible melanoma spots on heart skin