Sonographic diagnosis of intraluminal bile duct neoplasm: a report of 3 cases

Intraluminal growing tumors of the bile duct are uncommon causes of jaundice. The sonographic appearance of 2 hilar cholangiocarcinomas or Klatskin tumors and a benign extrahepatic biliary cystadenoma is described. Compared to contrast studies of the bile ducts, sonography better defined the intraductal character of the neoplasms. However, the ultrasound appearance did not allow differentiation between the adenocarcinomas and the benign cystadenoma.