Of the 137 GBM patients with twofold overexpression of EGFR mRNA, 62 patients with high levels of IL-13Rα2 (red) had a poor survival outcome when compared to 32 patients with low levels of IL-13Rα2 (green) (Fig. 1b; log-rank p-value = 0.03). This evidence concerns the gene EGFR and glioblastoma.