CEACAM5 and cyst: A low intracystic glucose level of <50 mg/dL is also sensitive for distinguishing benign, non-mucinous cysts from mucinous PCLs conferring malignant potential.18 Novel cut-offs have been proposed through co-analysis of cyst fluid CEA with a cut-off of 135.1 ng/mL and a glucose cut-off of 2.8 mmol/L to rule in mucinous neoplastic PCLs.