# Intraductal Papillary Mucinous Neoplasm of the Bile Duct (IPMN-B): A Rare and Diagnostically Challenging Entity

## TL;DR

Intraductal Papillary Mucinous Neoplasm of the Bile Duct is a rare liver tumor that requires early diagnosis and surgery due to cancer risk.

## Contribution

Highlights the diagnostic importance of IPMN-B in hepatic cystic lesions due to its high risk of invasive carcinoma.

## Key findings

- IPMN-B is rare but must be considered in hepatic cystic lesions with biliary dilatation.
- Unlike 95% of similar lesions, IPMN-B has a significant risk of invasive carcinoma.
- Early diagnosis and complete surgical resection are critical for IPMN-B.

## Abstract

Teaching point: Albeit rare, IPMN-B should be considered and excluded when encountering a large hepatic cystic lesion, especially in the setting of associated biliary dilatation, because in contrast to 95% of other hepatic cystic lesions, it has significant risk of harboring invasive carcinoma and therefore mandates early accurate diagnosis and complete surgical resection.