Table 4 Predicted rates of mosaicism by age at presentation of bilateral vestibular schwannomas (BVS)
| Â | Number | Constitutional | % | Mosaic presumed from tumor or blood | No variant found | % No variant | Overall probable mosaic rate | |
|---|---|---|---|---|---|---|---|---|
BVS <20 | 175 | 136 | 77.71% | 27 | 15.43% | 12 | 6.86% | 21.67% |
BVS 20–29 | 114 | 69 | 60.53% | 21 | 18.42% | 24 | 21.05% | 37.58% |
BVS 30–39 | 110 | 48 | 43.64% | 36 | 32.73% | 26 | 23.64% | 54.24% |
BVS 40–49 | 79 | 23 | 29.11% | 20 | 25.32% | 36 | 45.57% | 66.78% |
BVS 50–59 | 69 | 11 | 15.94% | 13 | 18.84% | 45 | 65.22% | 78.19% |
BVS 60+ | 84 | 8 | 9.52% | 5 | 5.95% | 69 | 82.14% | 80.70% |
Total | 631 | 295 | 46.75% | 122 | 19.33% | 212 | 33.60% | 49.91% |
