Various tumor related biomarkers have been found in glioblastoma, including epidermal growth factor receptor (EGFR), mutant form of the EGFR (EGFRvIII), vascular endothelial growth factor (VEGF), p53 and Phosphate and tensin homolog deleted on chromosome 10 (PTEN), Retinoblastoma (RB1) and Isocitrate dehydrogenase (IDH) (Appin and Brat, 2015). Here, VEGFA is linked to glioblastoma.