| Surgery | MGMT Status | Total | |
| Methylated | Unmethylated | ||
| Biospy | 1 (8.3%) | 0 (0%) | 1 (5%) |
| Subtotal resection | 7 (58.3%) | 5 (62.5%) | 12 (60%) |
| Total resection | 4 (33.3%) | 3 (37.5%) | 7 (35%) |
| Total | 12 (100%) | 8 (100%) | 20 (100%) |