title: Sonographic appearance of Klatskin tumors.
mesh_terms: D001650:Bile Duct Neoplasms / Q000175:diagnosis*; D001653:Bile Ducts, Intrahepatic / Q000473:pathology; D003937:Diagnosis, Differential; D042882:Gallstones / Q000175:diagnosis; D006801:Humans; D014463:Ultrasonography