In recent years, various molecular markers have been discovered for gliomas, including isocitrate dehydrogenase 1 and 2 (IDH 1/2) mutations (Lu et al., 2012), codeletion of chromosome arms 1p and 19q (1p19q co-del) (Cairncross et al., 2013; van den Bent et al., 2013; Buckner et al., 2017) and telomerase reverse transcriptase promoter (TERT-p) hotspot mutations (Chan et al., 2015; Foote et al., 2015; Heidenreich et al., 2015; Masui et al., 2018). Here, TERT is linked to central nervous system cancer.