Duodenal diaphragm.
D000328:Adult; D004380:Duodenal Obstruction / Q000209:etiology* / Q000601:surgery; D004386:Duodenum / Q000002:abnormalities*; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000209:etiology*