Univariate analysis shows that the following factors were significantly related to postoperative survival: depth (P = 0.004), lymph node metastasis (P = 0.007), distant metastasis (P < 0.001), TNM stage (P = 0.004), and LRPPRC expression (P < 0.001). Here, LRPPRC is linked to metastatic malignant neoplasm in the lymph nodes.