Intraductal papillary neoplasm of the bile duct: review of updated clinicopathological and imaging characteristics.

Intraductal papillary neoplasm of the bile duct (IPNB) is a rare condition that might cause bile duct cancer. It has not been studied as much as intraductal papillary mucinous neoplasm, a similar disease of the pancreas. The aim of this article was to look at past studies and sum up what we know about IPNB, such as how it shows up in tests and what it looks like. The authors studied earlier research to learn about IPNB, including its two main kinds, called type 1 and type 2, based on a 2010 list from the WHO. The authors found and listed the main features of IPNB by looking at past research. We still do not know a lot about IPNB, and sometimes experts disagree. More research with lots of people and detailed studies will help us understand this condition better.