Fistula in ano.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012003:Rectal Fistula / Q000209:etiology / Q000473:pathology*