Obstruction of the duodenum beyond the ampulla of vater; a possible cause of symptoms suggesting disease of the biliary tract.
D014670:Ampulla of Vater; D001659:Biliary Tract; D001660:Biliary Tract Diseases; D004386:Duodenum; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology*
BILIARY TRACT/diseases; INTESTINAL OBSTRUCTION/etiology and pathogenesis