[Case of regurgitation of barium in the biliary tract and discussion on its mechanisms].
D000368:Aged; D001466:Barium Sulfate; D001660:Biliary Tract Diseases / Q000000981:diagnostic imaging*; D002758:Cholangiography; D003287:Contrast Media; D004064:Digestive System / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged