Table 2 Distribution of the WHO grades at the second and the third surgery in originally WHO grade I meningiomas.
From: Histological transformation in recurrent WHO grade I meningiomas
WHO grade | 2nd surgery | 3rd surgery |
|---|---|---|
I | 76 (87.4%) | 14 (70%) |
II | 8 (9.2%) | 3 (15%) |
III | 3 (3.4%) | 3 (15%) |
Total | 87 | 20 |
