Cholangiopathies and other disorders involving bile ducts | Cholelithiasis | Biliary strictures after invasive procedure | Cholangiocellular carcinoma | Primary sclerosing cholangitis | AIDS cholangiopathy | CMV | Cryptosporidium sp | HIV | Choledochal cyst | Sphincter of Oddi dysfunction | Parasitic infections | Ascaris lumricoides | Histiocytosis X | | Extrinsic causes | Pancreatitis (acute and chronic) | Pancreatic carcinoma | Portal adenopathy | Metastases | Tuberculosis | Periampullary carcinoma | Periampullary diverticulum | Mirizzi's syndrome | |