Neoplasm/Carcinoma: First Reported Case in Australia and Literature Review

Biliary (hepatic and extrahepatic) intraductal papillary mucinous neoplasms and intraductal oncocytic papillary neoplasms/carcinoma are rare neoplasms. Classification of biliary intraductal papillary tumors can be confusing and reports in radiology literature are extremely limited. We describe the first reported case of biliary intraductal oncocytic papillary neoplasms/carcinoma in the liver in Australia. The intraductal nature of such neoplasms can be identified on magnetic resonance imaging and magnetic resonance cholangiopan-creatography. Despite increasing reported cases and understanding of the pancreatic intraductal papillary mucinous neoplasm (IPMN) [1-4], biliary (hepatic or extrahepatic) IPMN is still rarely encountered. Classification of such intrahepatic biliary IPMN can be confusing. Yamamoto et al classified such tumor as a rare subtype type of peripheral cholangiocar-cinoma, which has a better prognosis than the mass forming and periductal forms [5]. Biliary intraductal papillary form