PDGFRA and glioblastoma: This group was enriched for chromosome 1p and 20q loss, 17q gain (p = 0.00595, p = 0.0286, p = 0.0478, respectively, Fisher’s exact test) (Figure 8C), harbored PDGFRA and MET amplifications (p = 0.0159, Fisher’s exact test) (Figure 8D), and was strongly associated with the adult GBM-defined “Proneural” gene signature.