Bilateral hip osteonecrosis: Influence of hip size on outcome

Abstract

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.