MUC2 and pancreatic ductal adenocarcinoma: However, there were errors, e.g., in the case of pancreatic ductal adenocarcinoma (case 3), it pointed out that "CDX2 is typically negative in pancreatic ductal adenocarcinoma, while positive in metastatic colorectal adenocarcinomas to pancreas" and recommended "MUC stains as MUC1 is typically positive in pancreatic ductal adenocarcinoma, while MUC2 is indicative of intraductal papillary mucinous neoplasm (IPMN) or mucinous cystic neoplasm (MCN) of the pancreas" which are incorrect statements.