TET1 and posterior cortical atrophy: In TET1-high PCa, four significantly hypomethylated CpG-sites in the TET1-promoter and five significantly hypermethylated CpG-sites in the TET1 5′-UTR and gene body were detected (Fig. 2C.3, Additional file 2: Table S4 and Additional file 1: Fig. S4).