It was shown that the intestinal subtype of IPNB was more frequently positive for MUC1 and less frequently positive for MUC2, MUC5AC and CDX2 (a MUC2 regulating transcription factor), compared to each subtype of pancreatic IPMN [90]. The gene discussed is MUC5AC; the disease is pancreatic intraductal papillary-mucinous neoplasm.