NT-2, NT-3 and NT-4 gliomas were essentially composed of IDH-wt gliomas (180/188 samples, 95.7%), IDH-mutated gliomas with the 1p/19q co-deletion (75/81 samples, 92.6%) and IDH-mutated gliomas without the 1p/19q co-deletion (176/224 samples, 78.6%), respectively. The gene discussed is IDH1; the disease is central nervous system cancer.