摘要Mucin-producing bile duct tumors (MPBTs) are characterized by intraductal papillary tumors producing large amounts of mucin.The tumor comprises macroscopically prominent intraductal papillary neoplastic epithelia and produces a large amount of viscid mucin,resulting in dilatation of the bile ducts.1 These tumors of the peripheral bile duct,which include benign and malignant lesions,have also been referred to as intraductal growthtype peripheral cholangiocarcinomas,2 mucin-producing cholangiocellular carcinomas,3 intraductal papillary neoplasms (IPNs) of the biliary tract,4 IPNs of the liver,5 or IPNs of the bile duct.6 MPBTs have been the subject of recent attention due to its peculiar histopathology,biological and clinical behavior,varied radiological manifestations,and good prognosis of the patients.7