The expression levels of RAD51D and XRCC2 were significantly correlated with pathological T stage, N stage, number of lymph node metastases, lymph node metastasis rate, TNM stage, and Lauren's classification (p < 0.05) (Figure 5C–H,K–P). The gene discussed is RAD51D; the disease is metastatic malignant neoplasm in the lymph nodes.