Application of endoscopic ultrasonography in the diagnosis of cholangiocarcinoma

Cholangiocarcinoma is the second common tumor in the hepatobiliary system, with clinical features of biliary stricture, difficult early diagnosis and poor prognosis. High-resolution endoscopic ultrasonography can observe closely the bile duct tree and adjacent organs. In this article, authors reviewed the application of endoscopic ultrasonography in the diagnosis of cholangiocarcinoma.