Table 1.
Demographic characteristics of 381 patients with vestibular schwannoma.
| Characteristics | Value (n or median) | Range or percentage |
|---|---|---|
| Sex (male: female) | 163:218 | 42.7% |
| Age (range), y/o | 53.9 | 14.9–83.1 |
| Laterality (left: right) | 209:172 | 54.9% |
| Tumor volume (ml) | 2.05 | 0.08–17.1 |
| Tumor characteristics | ||
| Solid | 168 | 44.1% |
| Cystic | 17 | 4.8% |
| Mixed | 172 | 45.1% |
| Neurological deficits | ||
| Hearing impairment | 285 | 74.8% |
| Dizziness, tinnitus, imbalance | 259 | 68.0% |
| Facial palsy | 48 | 12.6% |
| Other CN deficits | 46 | 12.1% |
| Long-tract sign (gait or weakness) | 44 | 11.5% |
| Cerebellar sign | 42 | 11.0% |
| SRS parameters | ||
| Max dose (Gy) | 21.0 | 15.4–24.6 |
| Margin dose (Gy) | 12.0 | 11.0–15.0 |
| Isodose level (%) | 57.0 | 50–85 |
| Clinical follow-up | 73.0 | 6.1–217 |
| Image follow-up (in months) | 71.3 | 5.6–217 |
| Image outcomes | ||
| Regression or stable | 168 | 44.1% |
| Pseudo-progression | 172 | 45.1% |
| Progression | 17 | 4.8% |