TERT and glioblastoma: The mutation status of the 21 patients with glioblastoma was as follows: all 21 had isocitrate dehydrogenase (IDH)-wildtype; 11 had a telomerase reverse transcriptase (TERT) promoter C228T mutation, and 10 had an O6-methylguanine-DNA methyltransferase (MGMT) methylation.