In this analysis, glioblastoma defined by the current classification consisted of three entities defined by the WHO CNS4 classification: glioblastoma, IDH-wildtype (146/191), anaplastic astrocytoma, IDH-wildtype (26/191), and diffuse astrocytoma, IDH-wildtype (19/191). The gene discussed is IDH1; the disease is anaplastic astrocytoma.