Objective To investigate the corrective results of congenital scoliosis with type II split spinal cord malformation.Methods By reviewing the medical records and roentgenograms of congenital scoliosis patients with type II split spinal cord malformation that underwent corrective surgery

septum location and length

curve type

coronal and sagittal Cobb’s angles

apical vertebral rotation and translation

and trunk shift were measured and analyzed.Results A total of 23 congenital scoliosis patients with type II split spinal cord malformation were studied

6 cases were due to failure of segmentation

8 cases due to failure of formation

and the remaining 9 cases due to mixed defects.The fibrous septums were located in the thoracic spine in 8 patients

lumbar spine in 4 patients

thoracic and lumbar spine in 10 patients

and from cervical to lumbar spine in 1 patient.The septum extended an average of 4.9 segments.Corrective surgeries included anterior correction with instrumentation in 2 patients

posterior correction with instrumentation in 11 patients

anterior release and posterior correction with instrumentation in 6 patients

anterior and posterior resection of the hemivertebra and posterior correction with instrumentation in 4 patients.The pre- and postoperative coronal Cobb’s angles

apical vertebral translations

apical vertebral rotations

trunk shifts were 61.9° and 32.5°（P<0.001）

48.9 mm and 31.5 mm （P<0.001）

1.2 and 1.1

12.7 mm and 8.2 mm

respectively.The average correction rate of coronal Cobbs angle was 47.5%.The sagittal balance was also well improved.The fibrous septums were all left in situ. There was no neurological complication.Conclusion For congenital scoliosis with type II split spinal cord malformation

positive correction results with no neurological complication may be obtained without resection of the fibrous septum.