Table 2: Osteonecrosis Involvement at the Last Follow-Up (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 158 (35%) 75 (86%) 87 (100%)
Shoulder 151 (33%) 71 (88%) 81 (93%)
Knee 132 (29%) 18 (60%) 30 (34%)
Ankle 14 (3%) 4 (66%) 6 (7%)
Total 455 77 (89%) 87 (100%)