It is locatedin the promoter of telomerase gene in tumor cells and absent in non-neoplasticcells, thus being a mutation of choice for biomarker purposes in glioblastoma.10,39 In our ddPCR data, all samples with less than 30 positive dropletsfor wild-type TERT promoter copies were excludedfrom analysis, and all results with 0 or 1 positive droplet for the TERT C228T were considered as negative. Here, TERT is linked to glioblastoma.