IDH2 and glioblastoma: Molecular subtypes of TCGA-GBM by enrichment scores of seven prognostic cell senescence-related pathways revealed that C1 had the worst prognosis, and at the same time, C1 had the most IDH WT, a higher level of immune infiltration, high immune escape, and downregulation of cell senescence-related pathways, which might be the reasons for C1’ s poor prognosis.