CEACAM5 and neoplasm: After the fourth cycle (prior to surgery), the patient was tested for tumor markers, which showed: AFP level of 6.17 ng/mL, CA125 level of 9.5 U/mL, CA199 level of 6.15 U/mL, CEA level of 1.53 ng/mL, CA72-4 level of 2.69 U/mL, a PGI level of 54.3 ng/mL, PGII level of 12.8 ng/mL, and carcinoembryonic antigen level of 0.63 ng/mL.