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Glioma grading – WHO 2021

The 2021 World Health Organization (WHO) classification of tumors to the central nervous system defines the following 3 distinct categories of adult-type diffuse gliomas based on histology and IDH mutational status: astrocytomas (mIDH, 1p/19q-codel), grade 2-3; and glioblastomas (wtIDH) grad 4*

*Louis DN, et al. Neuro Oncologies 2021;23(8):1231-1251