Other regimens included radiation as monotherapy (IDH-wt astrocytoma: 4 (2.5%); IDH-wt glioblastoma: 16 (7.9%)), Nordic radiation scheme (IDH-wt astrocytoma: 0 (-); IDH-wt glioblastoma: 4 (2.0%)) and best-supportive care. Here, IDH1 is linked to glioblastoma.