CEACAM5 and metastatic malignant neoplasm in the lymph nodes: Subgroup analyses elucidated the metastatic model's enhanced discriminatory capacities, identifying an extra 6 patients (27.2%) with lymph node metastasis (LNM) and 5 patients (26.3%) with distant metastasis (DM), compared to CEA's detection of 12 individuals (54.5%) with LNM and 12 cases (63.2%) with DM (Figure 4D).