EGFR and glioblastoma: The World Health Organization (WHO)’s 2021 classified IDH-wildtype glioblastomas as a grade 4 adult-type diffuse glioma that does not harbor mutations in IDH, but usually harbors mutations in the telomerase reverse transcriptase (TERT) promoter, leading to the gain of chromosomes 7 and the loss of chromosome 10, and in the epidermal growth factor receptor (EGFR) [2].