Hip Dislocation After Correction for Scoliosis in an Adolescent with Angelman Syndrome: A Case Report.

Case: Although scoliosis is common in Angelman syndrome (AS), there are no reports of hip dislocation as a complication of scoliosis surgery. We experienced a case of hip dislocation after posterior spinal instrumentation and fusion from T4 to L5 because of scoliosis progression in an adolescent girl with AS. Postoperatively, posterior dislocation of the left hip occurred; after closed reduction, instability remained. Thus, periacetabular osteotomy was performed (left hip), with good clinical outcomes.

Conclusion: Especially in cases of abnormal muscle tone, a loss of spinal flexibility because of extensive spinal fixation may result in secondary pathologies of the hip joint.