1. What is osteochondritis dissecans?
2. How does OD present?
3. How is it diagnosed?
4. What is the treatment?
Answers:
1. Localized area of avascular necrosis of end of long bone with degeneration of overlying cartilage, which may detach and enter joint space. Medial femoral condyle is most often affected.
2. Primarily seen in adolescents. Joint pain and irritation, synovial effusion, buckling, locking.
3. Radiographs, CT.
4. Rest, NWB on knee. If no healing or if fragment detaches, surgical excision may be required.
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