Abstract: Objective To determine the pre-operation investigation,position calculating,surgical method and purpose of diastematomyelia with osseous divide and scoliosis.Methods Clinical studies,including surgical choices and operative methods,on 74 diastematomyelia patients with osseous divide and scoliosis were reviewed.Results All patients achieved a satisfactory result by osseous divide resection and lumbosacral dural sac plasty.Such surgical process makes patients in a good condition to accept further scoliosis instrumentation.Primary nerve damage symptoms were lightened or eliminated in some patients.Conclusion Before surgical instrumentation all scoliosis patients should have spinal X-ray,CT and MRI examination to determine if diastematomyelia accompanying osseous divide.Sole diastematomyelia do not need any treatment.Patients with diastematomyelia and osseous divide should accept osseous divide resection and lumbosacral dural sac plasty before spinal instrumentation operation,which is the most important for young patients in growing stage.

Key words: diastematomyelia, osseous divide in vertebral canal, scoliosis