Fusion with laminectomy by location of intradural extramedullary tumor.
| Total | Laminectomy Without Fusion, n | Laminectomy With Fusion, n | Total, n | Rate of Undergoing Fusion Procedures |
| Cervical | 311 | 72 | 383 | 19% |
| Thoracic | 801 | 67 | 868 | 8% |
| Lumbar | 734 | 42 | 776 | 5% |
| Total | 1846 | 181 | 2027 | 9% |