Differentiating hepatic mucinous cystic neoplasm from intraductal papillary neoplasms presenting as proximal biliary obstruction a case report

Hepatic mucinous cystic neoplasm (H-MCN) and intraductal papillary neoplasm (IPN-B) are rare mucinous biliary tumors with malignant potential. Both can present with proximal biliary obstruction and be difficult to distinguish from cholangiocarcinoma. We present one case of each (H-MCN, IPN-B), presenting with proximal biliary obstruction. We highlight the diagnostic challenges presented by these liver tumors and emphasize their indolent growth as one key distinguishing feature from cholangiocarcinoma. We also discuss their management including variations in surgical technique.