In the TCGA cohort, methylation of the ATP9B promoter was significantly correlated with tumor size (p = 0.023) and clinical stage (p = 0.006), methylation of the GALR1 promoter was significantly correlated with lymph node status (p = 0.024), and methylation of the HSBP1L1 promoter was significantly correlated with sex (p < 0.001) and smoking status (p = 0.002) (Table 2). Here, GALR1 is linked to neoplasm.