In contrast, compared with the nonmalnutrition group, the malnutrition group had significantly lower carcinoembryonic antigen (CEA) [2.93 (13.29) vs. 4.66 (19.59), P = 0.047], preoperative hemoglobin (114.85 ± 2.38 vs. 124.81 ± 1.68, P = 0.002), and platelet count [144 (117) vs. 175 (82.5), P = 0.022]. The gene discussed is CEACAM5; the disease is malnutrition.