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  • Title: Simultaneous anterior-posterior approach through a costotransversectomy for the treatment of congenital kyphosis and acquired kyphoscoliotic deformities.
    Author: Smith JT, Gollogly S, Dunn HK.
    Journal: J Bone Joint Surg Am; 2005 Oct; 87(10):2281-9. PubMed ID: 16203895.
    Abstract:
    BACKGROUND: Congenital kyphosis and acquired kyphoscoliotic deformities are uncommon but are potentially serious because of the risk of progressive deformity and possible paraplegia with growth. Our current approach for the treatment of these deformities is to use a single posterior incision and costotransversectomy to provide access for simultaneous anterior and posterior resection of a hemivertebra or spinal osteotomy, followed by anterior and/or posterior instrumentation and arthrodesis. To our knowledge, this approach has not been reported previously. METHODS: The medical records and radiographs for sixteen patients who had been managed at our institution for the treatment of congenital kyphosis and acquired kyphoscoliosis between 1988 and 2002 were analyzed. The mean age at the time of surgery was twelve years. The diagnosis was congenital kyphosis for fourteen patients and acquired kyphoscoliotic deformities following failed previous surgery for two. The mean preoperative kyphotic deformity was 65 degrees (range, 25 degrees to 160 degrees ), and the mean scoliotic deformity was 47 degrees (range, 7 degrees to 160 degrees ). Fifteen patients were managed with vertebral resection or osteotomy through a single posterior approach and costotransversectomy, anterior and posterior arthrodesis, and posterior segmental spinal instrumentation. The other patient was too small for spinal instrumentation at the time of vertebral resection. A simplified outcome score was created to evaluate the results. RESULTS: The mean duration of follow-up was 60.1 months. The mean correction of the major kyphotic deformity was 31 degrees (range, 0 degrees to 82 degrees ), and the mean correction of the major scoliotic deformity was 25 degrees (range, 0 degrees to 68 degrees ). Complications occurred in four patients; the complications included failure of posterior fixation requiring revision (one patient), lower extremity dysesthesias (one patient), and late progressive pelvic obliquity caudad to the fusion (two patients). The outcome, which was determined with use of a simplified outcomes score on the basis of patient satisfaction, was rated as satisfactory for thirteen patients, fair for two patients, and poor for one patient. CONCLUSIONS: A simultaneous anterior and posterior approach through a costotransversectomy is a challenging but safe, versatile, and effective approach for the treatment of complex kyphotic deformities of the thoracic spine, and it minimizes the risk of neurologic injury. LEVEL OF EVIDENCE: Therapeutic Level IV.
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