CEACAM5 and metastatic malignant neoplasm in the lymph nodes: In the two groups, the surgical modalities used were significantly different (P = 0.036), but there were no significant differences in age, gender, tumor location, histological grade, perineural invasion, vascular invasion, lymph node metastasis, CEA and CA19-9 levels, and adjuvant systemic therapy (P > 0.05).