Evaluation of treatment of hip subluxation in myelomeningocele by intertrochanteric varus derotation femoral osteotomy.

A retrospective study of 27 subluxed hips was carried out in 18 patients with myelomeningocele treated by varus derotation intertrochanteric osteotomy. Twenty-three of the 27 hips were stable at follow-up review. The causes of failure were related to the presence of pelvic obliquity secondary to scoliosis or to a dysplastic acetabulum (acetabular index above 25 to 30 degrees). Transfer of the iliopsoas tendon was not found to be necessary in order to achieve stable reduction.