CEACAM5 and pancreatic intraductal papillary-mucinous neoplasm: It has proven useful in differentiating malignant lesions from benign ones, as well as in IPMN diagnosis; however, it does not aid in distinguishing IPMNs from mucinous cystic neoplasms (MCNs), as an elevated level of CEA in cystic fluid is present in both lesions (Table 4) [14].