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Minimum 5-year follow-up outcomes for one-stage posterior instrumentation without neurosurgery intervention for correction of scoliosis associated with Chiari I malformation and syringomyelia

  • Orthopaedic Surgery
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Introduction

Traditionally, the common belief has been that, all patients with Chiari I malformation (CM-1) and syringomyelia (SM) undergoing a neurosurgical procedure even if they are neurologically asymptomatic. As the pathology of CM-1 and SM has become better understood, the traditional concepts have been challenged. The objective of this study was to investigate the minimum 5-year follow-up clinical outcomes of surgical treatment of patients with scoliosis associated with CM-1 and SM and to evaluate the necessity of neurosurgical intervention before corrective surgery.

Methods

This retrospective study was performed from May 2009 to September 2014. We enrolled 35 patients with scoliosis associated with CM-1 and SM who were undergoing spinal correction surgery without neurosurgical intervention. During the surgery, spinal cord monitor and wake-up test were used. Preoperative, postoperative, and final follow-up major curve coronary Cobb angle, correction rate, apical vertebral rotation (AVR), apical vertebral translation (AVT), thoracic kyphosis angle (T5–T12), lumbar lordosis angle (L1–S1) were analyzed on radiographs.

Results

The mean follow-up period was 82.5 months. The preoperative and postoperative mean curve coronary Cobb angle was from 55.7 ± 7.5° to 20.1 ± 5.8°, correction rate was 63.9%, AVR from 2.8 ± 0.6° to 1.3 ± 0.5°, AVT from 5.1 ± 1.4 to 1.7 ± 0.7 cm, thoracic kyphosis angle from 18.7 ± 4.0° to 32.2 ± 2.7°, lumbar lordosis angle from 36.3 ± 4.1° to 43.8 ± 3.2°. No neurological deficits occurred during the operation and follow-up.

Conclusions

Our minimum 5-year follow-up outcomes showed that in a distinct patient population of neurologically asymptomatic individuals with CM-1, SM and progressive scoliosis, posterior instrumented spinal deformity surgery can be safely done without neurosurgical interverventions with the help of preoperative flexibility evaluation and intraoperative neuromonitoring.

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Acknowledgements

The work was supported by the Hunan Province Natural Science Foundation of China (2020JJ4913, 2017JJ3489), Youth Research Fund of XiangYa Hospital of Central South University (2017Q16).

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Authors and Affiliations

  1. Department of Spine Surgery and Orthopaedics, Xiangya Spinal Surgery Center, Xiangya Hospital of Central South University, Xiang Ya Road 87, Changsha, China

    Hong-Qi Zhang, Yu-Xiang Wang, Chao-Feng Guo, Ming-Xing Tang, Shaohua Liu, Ang Deng & Qile Gao

  2. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China

    Hong-Qi Zhang, Yu-Xiang Wang, Chao-Feng Guo, Ming-Xing Tang, Shaohua Liu, Ang Deng & Qile Gao

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  1. Hong-Qi Zhang
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Correspondence to Yu-Xiang Wang.

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Zhang, HQ., Wang, YX., Guo, CF. et al. Minimum 5-year follow-up outcomes for one-stage posterior instrumentation without neurosurgery intervention for correction of scoliosis associated with Chiari I malformation and syringomyelia. Arch Orthop Trauma Surg 142, 123–129 (2022). https://doi.org/10.1007/s00402-020-03636-8

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