Basal cell carcinoma of the anus: report of two cases.
D000368:Aged; D001003:Anal Canal / Q000473:pathology; D001005:Anus Neoplasms / Q000473:pathology; D002280:Basal Cell Carcinoma / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D010502:Perineum / Q000473:pathology