Long-term results of derotational femoral varus osteotomy in Legg-Calvé-Perthes disease: 26-year follow-up.

The long-term results of 30 patients (31 hips) who underwent derotational femoral varus osteotomy for Legg-Calvé-Perthes disease are presented. Pain, leg-length discrepancy, Trendelenburg sign, and range of motion at the operated hip were examined clinically. Radiographic analysis included measurement of the Wiberg angle, epiphyseal index, acetabular index, and the Mose index. All were found to be satisfactory for patients in the good/fair category. Good/fair results were obtained in 27 (87%) of 31 hips according to Catterall's postoperative classification. Four patients were classified in the poor category due to severe restriction of movement and constant hip pain. Therefore, derotational femoral varus osteotomy is recommended for the treatment of patients with Legg-Calvé-Perthes disease.