• Hideo Hosoe, Kei Miyamoto, Eiji Wada, and Katsuji Shimizu.
• Department of Orthopaedic Surgery, Gifu University School of Medicine, Yanagido, Gifu City, Japan. osoe@cc.gifu-u.ac.jp
• Spine. 2006 May 1;31(10):E302-6.

Study DesignThis is a report of a 12-year-old girl treated surgically for scoliosis associated with bilateral hip dislocation in Larsen syndrome.ObjectiveTo describe a rare case of scoliosis associated with Larsen syndrome and bilateral hip dislocation that was treated surgically with follow-up for 15 years.Summary Of Background DataThere are few reports of the long-term follow-up of cases involving surgically treated scoliosis associated with bilaterally dislocated hips.MethodsThe patient's spine showed a right thoracic curve (T5-T12) with a Cobb angle of 77 degrees and did not show pelvic obliquity on an anterior-posterior radiograph film. On the sagittal alignment of her spine, the thoracic spine showed an abnormal lordosis (T5-T12: 19 degrees), and the lumbar spine had a hyperlordosis (L1-S1: 57 degrees) with a large lumbosacral angle (72 degrees ). We performed a posterior spinal fusion between T4 and L2 using Cotrel-Dubousset Instrumentation, anticipating the restoration of normal lumbar and cervical lordosis, as well as thoracic kyphosis.ResultsThe Cobb angle of thoracic scoliosis improved from 77 degrees to 28 degrees, and a thoracic kyphosis of 12 degrees (T5-T12) was obtained. Subsequently, on the sagittal plane, the lumbosacral angle (sacral anteflexion) decreased from 72 degrees to 52 degrees, comparable to that of patients with hip dislocation, and the lumbar lordotic angle increased from 57 degrees to 66 degrees. The restoration of thoracic kyphosis resulted in an increase of lumbar lordosis and decrease of sacral anteflexion. At the 15-year follow-up,although the thoracic scoliosis (T5-T12) had increased to 36 degrees, good coronal and sagittal balance had been maintained. The patient is asymptomatic in her spine and hip.ConclusionsA case of scoliosis associated with dislocated hips in a patient with Larsen syndrome was successfully treated with posterior correction surgery. Fusion surgery between T4 and L2 provided an ideal sagittal balance of the total spine, while preserving 4 lumbar mobile segments.

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