IDH2 and astrocytoma (excluding glioblastoma): The gene set includes IDH1, IDH2, BRAF, CDKN2A/B, PTEN, and NOTCH1, but misses CIC, FUBP1, ATRX, and H3-3A important for oligodendroglioma and astrocytoma diagnosis (Ye et al., 2022).