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2007 WHO classification scheme of diffuse glioma according to histology and grade.
| Phenotype | Subtype | Grade |
|---|---|---|
| Astrocytic tumors | Pilocytic astrocytoma | I |
| Diffuse astrocytoma | II | |
| Anaplastic astrocytoma | III | |
| Glioblastoma | IV | |
| Oligodendroglial tumors | Oligodendroglioma | II |
| Anaplastic oligodendroglioma | III | |
| Oligoastrocytic tumors | Oligoastrocytoma | II |
| Anaplastic oligoastrocytoma | III | |
