Pancreatic Intraductal Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A group of cystic or mass-forming epithelial neoplasms that arise from the exocrine pancreas, exhibit ductal differentiation, and grow mostly within the pancreatic ducts. This group includes the pancreatic intraductal papillary mucinous neoplasms and the pancreatic intraductal tubulopapillary neoplasms.