Typical mutations and numerical alterations of the genes with established relevance for glioblastoma/gliosarcoma, IDH-wildtype comprising CCND1, CCND2, CDK4, CDK6, EGFR, MDM4, MET, NF1, PDGFRA, PTEN and RB1 were not observed. Here, IDH1 is linked to glioblastoma.