CEACAM5 and cyst: While for cyst amylase level, the ROC was 0.554 (95% CI 0.335–0.772) (Figure 2), with amylase value according to the Youden index of 181 unit/L or more that was associated with sensitivity of 0.781 and specificity of 0.429, suggesting that CEA is more specific than amylase for mucinous cysts.