Moreover, Alnahhas et al reported that PDGFRA amplification was associated with poor survival only in EGFR/ERBB-altered GBM.38 However, in our study, no case had both PDGFRA amplification and EGFR amplification, suggesting that our patient background was different from that of the patient group analyzed in their study. This evidence concerns the gene PDGFRA and glioblastoma.