MGMT and glioblastoma: A 51-year-old male diagnosed with O6-methylguanine-DNA methyltransferase (MGMT) methylated, isocitrate dehydrogenase (IDH)-wild type central nervous system WHO Grade IV GBM five years ago (initially presented with a 4.7 cm x 3.5 cm left frontal mass), underwent a gross total resection and was treated with radiation therapy and temozolomide (TMZ).