CEACAM5 and cyst: Tumor located in the pancreatic head/uncinate/neck, cyst wall enhancement, cyst with a solid component, CEA ≥5 ng/ml, serum CA 19-9 ≥37 u/ml, MPD diameter ≥10 mm, cyst size ≥3 cm, NLR ≥2, and PLR ≥120 were strongly associated with malignancy (P < 0.001).