TERT and glioblastoma: A study of IDH wild-type GBM tumorigenesis found that gain of chromosome 7, loss of 9p, or loss of 10 was commonly found in the early phase of tumor growth, with TERT promoter mutations later initiating a rapid growth phase.3 In the present case, gain of chromosome 7, loss of chromosome 10, as well as an SNV in the TERT promoter region were detected.