MUC5AC and cystic neoplasm: Ninety percent of all cystic neoplasms are comprised of serous cystadenomas (SCAs), a non-mucinous lesion, as well as mucin-producing cystic tumors comprised of mucinous cystic neoplasms (MCNs) and intraductal papillary mucinous neoplasms (IPMNs) [10].