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| Simpson Grade | Completeness of Resection | 10-year Recurrence |
|---|---|---|
| Grade I | complete removal including resection of underlying bone and associated dura | 9% |
| Grade II | complete removal + coagulation of dural attachment | 19% |
| Grade III | complete removal w/o resection of dura or coagulation | 29% |
| Grade IV | subtotal resection | 40% |
Česky
