While TERTp mutation status was unavailable, pediatric tumors, originally diagnosed as IDH-wildtype glioblastoma, were present in the cohort of misclassified IDH-wildtype glioblastomas published by Capper et al. In this dataset, 88% of misclassified IDH-wildtype samples were diffuse hemispheric glioma, H3 G34-mutant, WHO grade 4 while only 2% of correctly classified samples were diffuse hemispheric glioma, H3 G34-mutant (p < 1e−22, Fisher’s exact, Additional file 2: Fig. 13B). The gene discussed is IDH1; the disease is glioblastoma.