Gastric subtype of intraductal papillary neoplasm of the bile duct: The pathologic spectrum

Background and Aims Intraductal papillary neoplasms of bile duct (IPNBs) remain a challenging entity to manage. Methods The pathologic spectrum of 34 gastric subtype of IPNB (gIPNB) cases was examined in consideration of the type 1 and 2 subclassification proposed by Japan‐Korea consensus and compared with gastric subtype of pancreatic intraductal papillary mucinous neoplasm (gIPMN) (44 cases). Results Type 1 gIPNBs (17 cases) showed regular...