- Relationship between pathology features and recurrence rate in patients with WHO grade 2 meningioma.
| Pathologic features | Recurrence N (%) | P-value |
|---|---|---|
| Atypical meningioma | 10 (16.6) | 0.83 |
| 4-19 mitotic figures/10 high power fields | 2 (25) | 0.87 |
| Brain invasion | 2 (14.2) | 0.91 |
| Increased cellularity | 6 (13.6) | 0.27 |
| High Nuclear- cytoplasmic ratio | 6 (13.3) | 0.28 |
| sheet-like growth | 7 (22.5) | 0.70 |
| Necrosis | 4 (20) | 0.85 |
| Chordoid/clear cell meningioma | 2 (14.2) | 0.85 |
| Ki- 67 | ||
| 0-5% | 5 (14.7) | 0.58 |
| - 6-15% | 6 (18.2) | |
| - >15% | 1 (14.3) |