[Primary anorectal melanoma. Observation of 2 cases].
D000368:Aged; D001005:Anus Neoplasms / Q000473:pathology*; D001706:Biopsy; D005260:Female; D006801:Humans; D008545:Melanoma / Q000473:pathology; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000473:pathology*
Melanoma primario anorrectal. Observación de dos casos.