Retrorectal abscess: a complication of terminal ileal Crohn's disease.
D000038:Abscess / Q000209:etiology*; D000328:Adult; D003424:Crohn Disease / Q000150:complications*; D006801:Humans; D007079:Ileitis; D008297:Male; D008875:Middle Aged; D010388:Pelvis; D012002:Rectal Diseases / Q000209:etiology*