There were no significant differences in age, sex, smoking history, alcohol history, ASA class, the presence of diabetes, the presence of hypertension, the presence of coronary heart disease, cancer stage, lesion location, HbA1c, ALT, CRP, CEA, CA-199, total albumin, and total bilirubin between two groups of patients with BMI < 25.0 kg/m2 and BMI ≥ 25.0 kg/m2. The gene discussed is ALB; the disease is cancer.