Table 1 Brooker classification of heterotopic ossification [6]
From: Prophylaxis of heterotopic ossification – an updated review
Grade 1 | Islands of bone within the soft tissues about the hip |
|---|---|
Grade 2 | Bone spurs from the pelvis or proximal end of the femur, leaving at least one centimeter between opposing bone surfaces |
Grade 3 | Bone spurs from the pelvis or proximal end of the femur, reducing the space between opposing bone surfaces to less than one centimeter |
Grade 4 | Apparent bone ankylosis of the hip |