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Table 1 Effect of 2016 WHO classification on the subdivision of glioma subgroups

From: Clinical insights gained by refining the 2016 WHO classification of diffuse gliomas with: EGFR amplification, TERT mutations, PTEN deletion and MGMT methylation

  WHO Classification 2016 Totals
GBM (IDH wt/IDH mut) 1p/19q codeleted and IDH mut Astrocytoma (IDH wt/IDH mut) NOS
WHO Classification 2007 GBM 256 0 0 0 256
Oligodendrogliomas (Grade II/III) 0 39 13 30 82 (52/30)
Astrocytoma (Grade II/III) 0 2 46 1 49 (21/28)
Oligoastrocytomas 0 8 35 10 53
NOS 0 0 4 0 4
  Totals 256 49 98 41 444 (100%)