直肠肛门部位发生的恶性黑色素瘤极为少见,1975年Moore首次报告一例,1982年国外已报告近500例。1984年国内仅有82例报告(见1985年中国外科年鉴146页)。肛管恶黑预后险恶,患者往往由于血性抑或淋巴转移而死亡。本文收集1967年4月～1987年9月有病理证实且手术的肛管恶黑9例,就其临床经过及其生物学行为结合文献复习予以探讨。 Malignant melanoma in the rectum and anal area is extremely rare. Moore first reported a case in 1975, and nearly 500 cases have been reported abroad in 1982. In 1984, there were only 82 reports in China (see 146 pages of the 1985 Chinese Surgical Yearbook). The prognosis of malignant black anal canal is treacherous. Patients often die due to blood or lymphatic metastasis. This article collected 9 cases of pathologically confirmed anorectal malignant black from April 1967 to September 1987, and discussed its clinical course and biological behavior combined with literature review.