Brooker HO Classification Of Hip

Modern Study Review (AI-Generated)

High-Yield Summary

The Brooker classification is a widely used system to grade heterotopic ossification (HO) around the hip, primarily after trauma, total hip arthroplasty (THA), or central nervous system injury. HO can significantly impair hip range of motion and function, impacting patient outcomes. Early recognition and grading guide prophylaxis and treatment strategies to optimize pain relief and restore mobility.

Key Diagnostic Findings

Current Gold Standard Treatment

• Non-operative:
• Prophylaxis with NSAIDs (e.g., indomethacin) and/or low-dose radiation therapy post-THA or trauma to reduce HO risk.
• Physical therapy focusing on maintaining range of motion without aggressive stretching that may exacerbate HO.

• Operative:
• Surgical excision of mature heterotopic bone is indicated for severe functional limitation (Brooker stage 3 or 4) after maturation (usually 6-12 months post-onset).
• Postoperative prophylaxis with NSAIDs or radiation to prevent recurrence is standard.

Modern Complications & Outcomes

• Complications:
• Recurrence of HO after excision if prophylaxis is inadequate.
• Persistent stiffness or ankylosis leading to chronic pain and disability.
• Surgical risks include infection, neurovascular injury, and bleeding.

• Outcomes:
• Early prophylaxis significantly reduces incidence and severity of HO.
• Surgical excision improves pain and function but timing is critical to avoid recurrence.
• Functional outcomes correlate strongly with residual range of motion and pain control.

Classic Clinical Notes

Brooker HO Classification of Hip

• Stage 0 – No heterotopic bone
• Stage 1 – Islands of bone within soft tissue
• Stage 2 – Bone spurs from pelvis to femur leaving at least 1 cm space between bones
• Stage 3 – Bone spurs from pelvis to femur leaving at less than 1 cm space between bones
• Stage 4 – Bony ankylosis of hip

Last Updated on January 24, 2026 by orthonet