title: Perirectal abscess.
mesh_terms: D000038:Abscess / Q000209:etiology*; D002675:Child, Preschool; D003093:Colitis, Ulcerative / Q000150:complications*; D003424:Crohn Disease / Q000150:complications*; D006801:Humans; D012002:Rectal Diseases / Q000209:etiology*