In 13 IDH-wildtype glioblastomas with chromosome 10 losses and TERT promoter mutations (10 tumors with “C228T”, 3 tumors with “C250T”) we compared the TERT promoter MAFs with the deleted allele frequencies on chromosome 10 as detected by ddPCR (Additional file 1: Fig. S7c). The gene discussed is IDH1; the disease is glioblastoma.