“…Characteristic clinicopathological features of IPMN are (1) secretion of a large quantity of mucin by papillary neoplasms, (2) dilatation of the main pancreatic duct (MPD) or branches, (3) slow growth with a favorable prognosis, (4) intraepithelial spread along the pancreatic duct, (5) rarity of symptoms, (6) possible multicentric development of cancer in the whole pancreas, (7) occasional concomitance of common-type invasive cancer of the pancreas, and (8) fistula formation to other organs [3].…”