IDH1 and central nervous system cancer: As a matter of fact, the status of TERTp, together with IDH mutations and 1p/19q co-deletion, classify gliomas in 5 distinct subcategories, i.e. triple negative, triple positive, cases with IDH/TERT mutations, and cases with a unique mutation (either IDH or TERT), that are typified by unique demographic, clinical and biological characteristics [6].