MUC5AC and pancreatic intraductal papillary-mucinous neoplasm: Furthermore, the formation of IPMN (Fig 1Ei), mucinous cystic neoplasm (MCN) (Fig 1Eii), and induced mucin secretion in the tissue section and around the pancreatic ducts (Fig 1Eiii–iv) were observed in the cerulein-with-AOM–treated mice.