Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 2 Brooker classification of HO of the hip
From: A classification method for neurogenic heterotopic ossification of the hip
Class | Patients (n = 24)/hips (n = 33) | Description |
|---|---|---|
I | – | Bone islands within soft tissues about the hip |
II | – | Bone spurs in pelvis or proximal end of femur, leaving at least 1 cm between the opposing bone surfaces |
III | 12/17 | Bone spurs that extend from the pelvis or the proximal end of the femur, which reduce the space between the opposing bone surfaces to less than 1 cm |
IV | 12/16 | Radiographic ankylosis of the hip |