[Primary malignant melanoma of the rectum].

Primary malignant melanoma of the rectum is a very aggressive tumor with a 5-year survival rate of 6%. Most reports include cases of both anal and of rectal melanoma together. We report 2 women with primary melanoma of the rectum, aged 67 and 72 years, who underwent abdominoperineal resection and survived 5 and 7 months respectively.