Table 2.
Treatment Site Characteristics.a
| Characteristic | Statistic |
|---|---|
| Treatments | 40 |
| Role of sSRS | |
| Primary | 21 (52) |
| Salvage | 11 (28) |
| Adjuvant | 8 (20) |
| Indications for sSRS | |
| Pain alone | 18 (45) |
| Pain with neurologic deficit | 13 (32) |
| Asymptomaticb | 8 (20) |
| Neurologic deficit alone | 1 (3) |
| Primary disease controlled | 24 (60) |
| Systemic disease controlled | 16 (40) |
| Location | |
| Cervical | 4 (10) |
| Thoracic | 13 (33) |
| Lumbar | 15 (37) |
| Sacral | 8 (20) |
| Number of vertebral levels treated | 1 [1-5] |
| Treatment site characteristics | |
| Posterior element involvement | 10 (25) |
| Paraspinal extension | 24 (60) |
| Neural foraminal involvement | 25 (63) |
| Epidural disease | 30 (75) |
| Thecal sac compression | 14 (35) |
| Spinal cord compression | 6 (15) |
| Preexisting vertebral fracture | 9 (23) |
| Prior local therapy | |
| Any radiotherapy | 16 (40) |
| EBRT | 11 (28) |
| SRS | 7 (18) |
| Any surgery | 14 (35) |
| Surgery with instrumentation | 11 (28) |
Abbreviations: EBRT, external beam radiotherapy; SRS, stereotactic radiosurgery; sSRS, spine stereotactic radiosurgery.
aValues are presented as mean ± standard deviation, number (percentage), or median [range].
bAsymptomatic radiographic progression or epidural disease.