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Bilateral hip osteonecrosis: influence of hip size on outcome
1Service de Chirurgie Orthopedique, Hôpital Henri Mondor, 51 avenue de Lattre de Tassigny, 94010 Creteil, France.
Objective:
To measure the volume of osteonecrosis in 30 patients with disease in both hips (one side with collapse and the other without at Ficat stage I).
Method:
The volume of the osteonecrosis was measured by magnetic resonance imaging.
Results:
The progression to collapse was influenced by the size of the lesion in each patient. The first collapsed hip was that with the largest volume of osteonecrosis.
Conclusion:
The volume of the osteonecrotic lesion on the second hip (stage I without collapse) is a good predictor of the time to collapse of this second hip.
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