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Intraductal tubulopapillary neoplasm (ITPN) of the pancreas. (a) A clogging tumor in the pancreatic duct consisted of tubulopapillary glands without obvious mucin (H & E staining, ×40 original magnification). (b) Neoplastic cells of ITPN show high‐grade atypia (H & E staining, ×200 original magnification).
