The median overall survival times for patients with tumors having no EGFR expression, over expressed EGFR only, or EGFRvIII were 12.3 (95% CI, 8.04–16.56), 11.03 (95% CI, 10.18–11.89) and 14.07 (95% CI, 7.39–20.74) months, respectively, indicating that neither EGFR or EGFRvIII were negative prognostic indicators in GBM patients unable to undergo GTR. Here, EGFR is linked to glioblastoma.