RT Journal Article SR Electronic T1 Bilateral hip osteonecrosis: influence of hip size on outcome JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 817 OP 821 DO 10.1136/ard.59.10.817 VO 59 IS 10 A1 Ph Hernigou A1 J C Lambotte YR 2000 UL http://ard.bmj.com/content/59/10/817.abstract AB 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.