EGFR and glioblastoma: In a report by Heimberger and colleagues, 42.6% of GBM patients failed to express EGFR, 25.9% had an overexpression of wtEGFR and 31.5% expressed a specific EGFR mutant (EGFRvIII, also known as EGFR type III, de2-7, ΔEGFR) [2].