'Microstaging' of anorectal melanoma improves prognosis.
D001005:Anus Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008545:Melanoma / Q000473:pathology*; D008875:Middle Aged; D009367:Neoplasm Staging; D012004:Rectal Neoplasms / Q000473:pathology*