Intraductal papillary mucinous neoplasms (IPMNs) usually occur within the head of the pancreas and arise within the pancreatic ducts. The ductal epithelium forms a papillary projection into the duct ...

Background and Aim: Intraductal papillary mucinous tumor (IPMT) of the pancreas can be divided into three clinically distinct subtypes: main duct type, branch duct type and mixed type. Although it ...

By contrast, nodular lesions project directly into the lumen of the bile duct. The papillary subtype is the rarest form of perihilar CCA, and these lesions are typically friable and do not invade ...