EGFR and glioblastoma: DNA methylation profiling of this group defines three distinct subtypes termed pHGG RTK1, pHGG RTK2 and pHGG MYCN, which are enriched in PDGFRA amplifications, EGFR amplification/TERT promoter mutations and MYCN amplifications, respectively, whereas the chromosomal pattern typical of adult‐type glioblastoma Chromosome 7 gain (+7)/Chromosome 10 loss (−10)/EGFRvIII variant is absent.