IDH1 and glioblastoma: According to the latest European Association of Neuro-Oncology guidelines, “glioblastoma is now defined as a diffuse astrocytic glioma with no mutations in IDH genes nor histone H3 genes and is characterized by microvascular proliferation, necrosis and/or specific molecular features, including TERT promoter mutation, EGFR gene amplification and/or a +7/−10 cytogenetic signature” [11].