The most commonly disrupted signaling cascades in GBM are pathways related to receptor tyrosine kinase (RTK), including epidermal growth factor receptor (EGFR), platelet derived growth factor receptor alpha (PDGFRA), basic fibroblast growth factor receptor 1 (FGFR-1), and insulin-like growth factor receptor (IGFR-1) [9], and nuclear factor-κB (NF-κB) [10]. Here, EGFR is linked to glioblastoma.