WNT7A and head and neck squamous cell carcinoma: DACT (1,2,3), WNT5A, and WNT7B were significantly positive correlation with TET1(p < 0.05), and WNT4 and WNT7A were negative correlation with TET1 in the TCGA Head and Neck Squamous cell Carcinoma database (p < 0.05, Additional file 1: Figure S1).