Pooled Median Survival in Months for Common Brain Tumors
| Grade | Prognosis, months |
| Astrocytoma | |
| Grade I (pilocytic astrocytoma) | Often cured with surgery |
| Grade II (astrocytoma) | 48-180 |
| Grade III (anaplastic astrocytoma) | 18-36 |
| Grade IV (glioblastoma multiforme) | 4.25-12 |
| Oligodendroglioma | |
| Grade II (oligodendrogliomas) | 55.2-204 |
| Grade III (anaplastic oligoastrocytoma) | 42-120 |
| Primary CNS lymphoma | 17-84 |
| Prognosis data are from References 12-19. | CNS, central nervous |
| system. |