Together with reports describing high rates ofMUC5AC expression in intraductal papillary mucinous neoplasm (IPMN), a commonprecursor lesion of pancreatic adenocarcinoma, these findings are all consistentwith a role of MUC5AC neo-expression during pancreatic cancer development.20,29, –31. The gene discussed is MUC5AC; the disease is pancreatic intraductal papillary-mucinous neoplasm.