1 Introduction Biliary tract carcinoma, also known as cholangiocarcinoma, is a rare but aggressive malignant tumor of the biliary tract. It can develop inside (intrahepatic) or outside (extrahepatic) the liver and usually affects older people, somewhat more frequently men. Risk factors include chronic inflammation of the bile ducts, gallstones, primary sclerosing cholangitis (PSC), parasitic infections (e.g.Continue reading