The Kruskal–Wallis test confirmed a significant difference in methylation of all examined genes between glioma types (p < 0.001 for AKT1, AKT3, CHUK, GSK3β, EGFR, PTEN, PIK3AP1; p = 0.032 for AKT2). The gene discussed is GSK3B; the disease is central nervous system cancer.