There were no significant differences in age(P = .56), sex(P = .51), BMI(P = .84), American Society of Anesthesiologists grade(P = .78), tumor location(P = .48), previous abdominal surgery(P = .89), preoperative chemotherapy(P = .69) or preoperative carcinoembryonic antigen (P = .67) between the two groups, as shown in Table 1. The gene discussed is CEACAM5; the disease is neoplasm.