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Cholangiocarcinoma (Klatskin tumor). A) magnetic resonance cholangiopancreatography using coronal thick slab technique demonstrating moderate intrahepatic biliary ducts dilatation due presence of T2 hypointense mass lesion (asterisk) at the junction of the right and left hepatic biliary ducts. B) The hilar mass shows modest enhancement after administration of intravenous gadolinium (asterisk).
