It belongs to the «adult-type diffuse glioma» family that also includes astrocytoma IDH-mutant (WHO grade 2, 3, or 4) and oligodendroglioma, IDH-mutant and 1p/19q-codeleted (WHO grade 2 or 3) [1]. This evidence concerns the gene IDH1 and astrocytoma (excluding glioblastoma).