title: Radiological case of the month. Free intraperitoneal air.
authors: Veterans Administration Hospital, Little Rock.
authors: D L
authors: DL
authors: Harshfield
authors: K G
authors: KG
authors: Grigg
mesh_terms: D000006:Abdomen, Acute / Q000000981:diagnostic imaging*; D000368:Aged; D004381:Duodenal Ulcer / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D010439:Peptic Ulcer Perforation / Q000000981:diagnostic imaging*; D011859:Radiography