Home > Bile duct diseases > Cholangiocarcinoma Proximal cholangiocarcinoma Advanced hilar cholangiocarcinoma Mar 13, 2005 Proximal cholangiocarcinoma (Klatskin tumor) visualized on EUS as a hypoechoic tumor mass inside the common bile duct, with complete invasion of the portal vein. The diagnosis was confirmed by EUS-guided FNA.   More images / movies:

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