Statistical results of PRDX6 expression were associated with histological type (P = 0.043), tumor number (P = 0.014) and TNM stage (P = 0.015), but not with age (P = 0.112), gender (P = 0.533), tumor size (P = 1), lymph node metastasis (P = 0.468), vascular invasion (P = 1), perineural invasion (P = 1) and distant metastasis (P = 0.742) (Table 1). Here, PRDX6 is linked to metastatic malignant neoplasm in the lymph nodes.