CEACAM5 and metastatic malignant neoplasm in the lymph nodes: Compared with other clinicopathological parameters, including Lauren subtype, gender, age, tumor size (T), lymph node metastasis (N), distant metastasis (M), TNM stage, tumor differentiation, preoperative serum carcinoembryonic antigen (CEA) levels, and preoperative serum carbohydrate antigen 19-9 (CA19-9) levels, univariate Cox regression revealed that the TIIC groups were indeed prognostic factors for gastric cancer (Supplementary Figure 2B).