MTAP and glioblastoma: Across 32 TCGA PanCancer Atlas studies, data accessed using cBioPortal [26, 27], MTAP loss is the maximum in GBM based on alteration frequency (deep deletion) and GBM has the maximum alteration frequency for deep deletion (> 40% of the cases); in terms of RNA expression data, GBM has the least median expression for MTAP.