Table 1 Clinical information of the recruited NF1 patients with rib head dislocations
(Mean ± SD)/no | |
|---|---|
Sex (F/M) | 20/17 |
Age (y) | 14.8 ± 5.3 (range, 8–33) |
Curve type | |
Right thoracic curve | 16 |
Left thoracic curve | 4 |
Double thoracic curve | 9 |
Double major curve | 8 |
Apex location | |
T4 | 1 (2.7%) |
T5 | 10 (27%) |
T6 | 11 (29.7%) |
T7 | 5 (13.5%) |
T8 | 4 (10.8%) |
T9 | 4 (10.8%) |
T10 | 1 (2.7%) |
T11 | 1 (2.7%) |
Level of rib-head dislocation | |
Apex-1 | 10 (18.9%) |
Apex | 23 (43.4%) |
Apex + 1 | 19 (35.8%) |
Apex + 2 | 1 (1.9%) |
Type of dislocated rib head | |
Single level | 23 (62.2%) |
Double levels | 12 (32.4%) |
Triple levels | 2 (5.4%) |
Fusion segments | 11.8 ± 1.7 (range, 9–14) |
Implant density (%) | 62 ± 11.1 (range, 42.8–83.3) |
Ratio of laminar hook (%) | 9.8 ± 12.9 (range, 0–37.5) |