Table 1.
Spetzler-Martin grading scale
| size of nidus | eloquence | venous drainage | |||
|---|---|---|---|---|---|
| <3cm | 1 | non-eloquent | 0 | superficial | 0 |
| 3cm~6cm | 2 | eloquent | 1 | deep | 1 |
| >6cm | 3 | ||||
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