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| n | % | |
|---|---|---|
| Bony invasion ( n = 153) | 51 | 33.3 |
| Lymphovascular invasion ( n = 108) | 8 | 7.4 |
| Cartilage invasion ( n = 143) | 20 | 14.0 |
| Perineural invasion ( n = 115) | 13 | 11.3 |
| Angioinvasion ( n = 107) | 8 | 7.5 |
| Dural invasion ( n = 227) | 7 | 3.1 |
| Brain invasion ( n = 174) | 3 | 1.7 |
| Orbital invasion ( n = 210) | 33 | 15.7 |
