The OS was known for 568 patients with IDH-wt (median: 12 months; range: 0–121 months; 440 died of GBM) and 24 with IDH-mutant (median: 20 months; range: 3–41 months; 9 died of GBM) GBMs in TCGA PanCancer Atlas series. Here, IDH1 is linked to glioblastoma.