IDH1 and glioma: IDHmut, 1p/19q non-codeleted gliomas (WHO 2021 Astrocytoma grade 2, 3 or 4) showed significant lower nCBV values compared to the IDHmut, 1p/19q codeleted gliomas (WHO 2021 Oligodendroglioma grade 2 or 3) and the IDH wildtype gliomas [24].