Feasibility of Single-Stage Posteriro Passive Correction and Fusion Surgery for COngenital Scoliosis in Adolescent Patients Who Have Attained Skeletal Maturity

Study Design: Retrospective study. Purpose: To report the perioperative and radiological outcomes of single-stage posterior passive correction and fusion (SSPPCF) in adolescent patients who present with congenital scoliosis. Overview of Literature: The surgical treatment for congenital scoliosis is complex. There is no definitive guide on surgical options for skeletally matured adolescent patients who have congenital scoliosis. Methods: Patients with congenital scoliosis who underwent SSPPCF using a pedicle screw system were reviewed. We identified the following three surgical indications: (1) hemivertebra or wedge vertebra over the thoracic or thoracolumbar region with structural lumbar curves, (2) hemivertebra or wedge vertebra at the lumbar region with significant pelvic obliquity or sacral slanting, and (3) mixed or complex congenital scoliosis. The demographic, perioperative, and radiographic data of these patients were collected. Results: Thirty-four patients were reviewed. The mean patient age was 14.6 +/- 3.4 years. There were 13 hemivertebrae, three wedged vertebrae, two butterfly vertebrae, three hemivertebrae with butterfly vertebra, eight unsegmented bars, and five multiple complex lesions. The average surgical duration was 219.4 +/- 68.8 minutes. The average blood loss was 1,208.4 +/- 763.5 mL. Seven patients required allogeneic blood transfusion. The mean hospital stay duration was 6.1 +/- 2.5 days. The complication rate was 11.8% (4/34): one patient had severe blood loss, one had rod breakage, and two had distal adding-on. The Cobb angle reduced from 65.9 degrees +/- 17.4 degrees to 36.3 degrees +/- 15.3 degrees ( p <0.001) with a correction rate (CR) of 44.8%+/- 17.4%. The regional kyphotic angle decreased from 39.9 degrees +/- 20.5 degrees to 27.5 degrees +/- 13.9 degrees ( p =0.001) with a CR of 19.3%+/- 49.6%. Radiographic parameters (radiographic shoulder height, clavicle angle, T1 tilt, cervical axis, pelvic obliquity, coronal balance, and apical vertebral translation) showed significant improvement postoperatively. Conclusions: SSPPCF was a feasible option for adolescent patients with congenital scoliosis who were skeletally matured.