Clinical features of Klippel-Feil syndrome
| KFS type | Features |
|---|---|
| 1 | Massive cervical fusion, may involve upper thoracic vertebrae |
| 2 | Fusion at 1 or 2 interspaces, may be associated with other vertebral anomalies—for example, hemivertebrae |
| 3 | Fusion of cervical and lower thoracic vertebrae |