Outcome of percutaneous proximal femoral varus derotation osteotomy and external fixation in cerebral palsy with subluxed or dislocated hip joint 01 Jan, 2015 Posted on January 2, 2015 - 2:14 pm by drsharan-admin presented during 21st Annual Conference of Paediatric Society of India (POSICON 2015), held in New Delhi (January 29-February 1, 2015).