Fig. 1.

a 9-year-old girl with spastic quadriplegic CP (GMFCS level IV) with a right hip dislocation and windswept hip deformity. b Post-operative bilateral hip adductor and flexor lengthenings (adductor longus, gracilis, iliopsoas), bilateral proximal femoral varus derotational osteotomies, right San Diego acetabuloplasty. Both hips are now concentrically reduced with improvements of pain and care-giving realized (CP, cerebral palsy; GMFCS, gross motor functional classification system)