SOD1 and metastatic malignant neoplasm in the lymph nodes: Univariate analysis indicated that advanced TNM stage, larger tumor size, lymph node metastasis, no adjuvant chemotherapy, and high SOD1 expression levels were factors associated with inferior overall survival (OS) with multivariate analysis, TNM stage (HR, 2.421; 95% CI, 1.221–4.801; P = 0.001), and SOD1 expression level (HR, 1.858; 95% CI, 1.164–2.966; P = 0.009) were identified as independent prognostic factors for OS.