| Diagnosis | MGMT Status | Total | |
| Methylated | Unmethylated | ||
| Glioblastoma Multiforme (GBM)—grade IV | 9 (75%) | 6 (75%) | 15 (75%) |
| Anaplastic astrocytoma—grade III | 2 (17%) | 2 (25%) | 4 (20%) |
| Gemistocytic astrocytoma—grade II | 1 (8%) | 0 (0%) | 1 (5%) |
| Total | 12 (100%) | 8 (100%) | 20 (100%) |