Table 2. Histologic Grade of Childhood Astrocytomas and Other Tumors of Glial Origin
| Type | WHO Histologic Grade |
| Astrocytic Tumors: | |
| Pilocytic astrocytoma | I |
| Pilomyxoid astrocytoma | II |
| Pleomorphic xanthoastrocytoma | II |
| Subependymal giant cell astrocytoma | I |
| Diffuse astrocytoma: | |
| Gemistocytic astrocytoma | II |
| Protoplasmic astrocytoma | II |
| Fibrillary astrocytoma | II |
| Anaplastic astrocytoma | III |
| Glioblastoma | IV |
| Oligodendroglial Tumors: | |
| Oligodendroglioma | II |
| Anaplastic oligodendroglioma | III |
| Mixed Gliomas: | |
| Oligoastrocytoma | II |
| Anaplastic oligoastrocytoma | III |
