Malignant melanoma of the anorectal region: two cases of prolonged survival.
D000328:Adult; D000368:Aged; D001005:Anus Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008545:Melanoma / Q000473:pathology*; D011379:Prognosis; D012004:Rectal Neoplasms / Q000473:pathology*