CEACAM5 and cyst: Newer PCL fluid markers are being evaluated and analyzed to aid in differentiation: a recent meta-analysis showed that cyst glucose concentration is more predictive of mucinous lesions than CEA, with a cyst fluid glucose of <50 mg/dL indicating a mucinous cyst with a sensitivity of 91% and specificity of 75% vs. 67% and 80%, respectively, for CEA in the same study population [48].