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The classification and location of invasive meningioma.
| Pathological classification | ||||
|---|---|---|---|---|
| WHO | WHO | WHO | ||
| The area of tumors | Cases | grade I | grade II | grade III |
| Cerebral convexity | 18 | 18 | 0 | 0 |
| Surrounding area of parasagittal region of cerebral falx | 17 | 17 | 0 | 0 |
| Surrounding area of transverse sinus and sigmoid sinus | 8 | 8 | 0 | 0 |
| Large blood and vessels | 4 | 2 | 2 | 0 |
| Skull | 6 | 6 | 0 | 0 |
| Cavernous sinus | 4 | 4 | 0 | 0 |
| Periorbital region | 1 | 1 | 0 | 0 |
| The infiltration of brain | 1 | 0 | 0 | 1 |
| In total | 59 | 56 | 2 | 1 |
