Melanoma of the anal canal.
D000368:Aged; D001005:Anus Neoplasms / Q000401:mortality / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008545:Melanoma / Q000401:mortality / Q000601:surgery*; D008875:Middle Aged; D011379:Prognosis; D013997:Time Factors