lesions considered include : simple ( bile duct ) cyst , adult polycystic kidney disease , caroli disease , pyogenic abscess , echinococcal cyst , amebic abscess , metastasis , biliary cystadenoma and cystadenocarcinoma , hepatocellular carcinoma , cholangiocarcinoma , biloma , and extrapancreatic pseudocyst .
C0005400
bile duct
C0206698
cholangiocarcinoma