Crohn's disease of the anal region.
D000328:Adult; D000368:Aged; D001003:Anal Canal / Q000473:pathology; D001004:Anus Diseases / Q000175:diagnosis* / Q000473:pathology; D003424:Crohn Disease / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male