title: A new roentgen sign in extrahepatic biliary tract disease.
authors.forename: S
authors.initials: S
authors.lastname: BROWN
authors.forename: F G
authors.initials: FG
authors.lastname: HARPER
mesh_terms: D017734:Bile Ducts, Extrahepatic; D001659:Biliary Tract / Q000000981:diagnostic imaging*; D001660:Biliary Tract Diseases; D006801:Humans; D010808:Physical Examination; D011859:Radiography