IDH1 and diffuse astrocytoma: The pathological diagnoses were GBM, IDH wild type, 15 (46.9%); GBM, IDH mutant, 2 (6.3%); GBM, nos (not otherwise specified), 1 (3.1%); Anaplastic astrocytoma, IDH wild type, 3 (9.4%); Anaplastic astrocytoma, IDH mutant, 7 (21.9%); Diffuse astrocytoma, IDH wild type, 1 (3.1%); Diffuse astrocytoma, IDH mutant, 3 (9.4%).