IDH1 and astrocytoma (excluding glioblastoma): We confirm the known association of TERT wildtype with preserved 1p/19q and IDH mutants in astrocytoma, and of its mutants with IDH wildtype in glioblastoma, and IDH mutants in oligodendroglioma.100,101 TERT wildtype was non-specific for both BRAF and histone wildtype and its mutants.