Recent investigative studies have identified several prognostic factors commonly used to predict the prognoses of GBM patients, such as the age of diagnosis, laterality, radiotherapy, chemotherapy (6), Karnofsky performance status (KPS), the extent of resection (total/gross, subtotal, or other), O6-methylguanine-DNA methyltransferase (MGMT) gene status (7), and isocitrate dehydrogenase (IDH) mutation status (8). This evidence concerns the gene MGMT and glioblastoma.