The preoperative clinical laboratory tests were as follows: tumor markers: preoperative CA19-9 > 27 U/mL (52.4%), preoperative CEA > 5 ng/mL (22.3%); liver function markers: ALB ≥ 40 g/L (79.0%), TBIL > 21 μmol/L (11.5%), AST > 40 U/L (9.6%), and ALT > 50 U/L (8.9%). Here, CEACAM5 is linked to neoplasm.