Hip dislocation in cerebral palsy occurrs with muscle imbalance about the hip. Selective muscle releases of hypertonic muscles were performed for prophylaxis of hip dislocation. The procedure included proximal elongation of the hamstrings and resection of adductor longus and gracilis. The psoas tendon and rectus femoris were elongated and the origin of the sartorius muscle was transferred to the anterior inferior iliac spine. If acetabular dysplasia or coxa valga were distinguished, we added pelvic osteotomy or femoral detorsion varus osteotomy.
