There were no significant differences in age, sex, body mass index, comorbidities, ASA score, performance status, cT stage, cN stage, tumor location and size, surgical resection, maximum size of liver metastatic lesions, number of liver metastatic lesions, Child–Pugh grade, CA724 level, AFP level, CEA level, CA199 level, CA125 level, C‐reactive protein level, albumin level, lymphocyte count level, HER2 status, pathological type, or number of organs with metastasis (all p > 0.05). This evidence concerns the gene ERBB2 and neoplasm.