In addition, as shown in Table 2, the positive expression of EZH2 is associated with lymph node metastasis (P = 0.02) and tumour size (P = 0.01), while the negative expression of DLC1 is associated with lymph node metastasis (P = 0.043) and tumour size (P = 0.036). This evidence concerns the gene DLC1 and metastatic malignant neoplasm in the lymph nodes.