Table 1: Osteonecrosis Involvement at Presentation (Epiphyseal and Metadiaphyseal Lesions)

Total Number of Osteonecrosis Percentage of Sites with Osteonecrosis n, (%) Number of Patients with Bilateral Lesions n, (%) Total Number of Patients n, (%)
Hip 70 (47%) 29 (70%) 41 (100%)
Shoulder 60 (40%) 23 (62%) 37 (90%)
Knee 14 (9%) 5 (45%) 11 (27%)
Ankle 5 (3%) 1 (33%) 3 (7%)
Total 149 29 (70%) 41 (100%)