Abstract
Purpose
There is no consensus on the optimal surgical treatment for high-grade spondylolisthesis (HGS) in adolescents. The purpose of this study was to assess the radiographic and clinical outcomes of a novel surgical approach to HGS consisting of a single-level anterior reduction, placement of a lordotic cage, and circumferential fixation without decompression.
Methods
This was a retrospective consecutive case series of 11 adolescents who underwent anterior reduction through placement of a lordotic cage followed by posterior fusion using pedicle screws and rods confined to L5–S1. Radiographic data included slip percentage, slip angle, lumbar lordosis, and pelvic sagittal parameters assessed at clinical visits preoperatively and at 2 years postoperatively. A telephone survey was conducted to obtain current information about function, activity level, work status, and retrograde ejaculation.
Results
Patients were followed for an average of 7.8 years (range 2–16). Mean age was 15.5 years (range 12–19). The mean percent slip corrected from 55 to 18%. The average slip angle was + 17.1° preoperatively and − 14.1° at final assessment (average correction of 20.7°). Thirty-six percent (4/11) of patients improved by three Meyerding grades and an additional 55% (6/11) improved by two grades. Complications included one instance each of superficial infection, wound dehiscence, and transient neuralgia. There were no cases of instrumentation failure, cage subsidence, pseudoarthrosis, or retrograde ejaculation. Radiographic evidence of fusion was observed in all cases.
Conclusion
Single-level anterior reduction and circumferential fusion without decompression appears to be a safe and effective alternative for the surgical treatment of pediatric HGS.
Level of evidence
IV.
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Data availability
The original/raw data for main outcomes presented in the paper can be found in Table 2.
Code availability
Not applicable.
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The authors thank Amy Bronstone, PhD, for assistance with editing the manuscript, Jarrod Brown and Austin Wheeler for assistance with data collection, and Darlene Guillot for creating the medical illustrations.
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A, H, K: Made substantial contributions to the conception or design of the work; or the acquisition, analysis, or interpretation of data; or the creation of new software used in the work. A, H, K: Drafted the work or revised it critically for important intellectual content. A, H, K: Approved the version to be published. A, H, K: Agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
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Dr. King reports having received payment from by Medicrea to attend a meeting outside the scope of this work. All other authors have nothing to disclose.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Approval was granted by the Institutional Review Board of the University of Louisiana Health Sciences Center (FWA 00002762).
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Alijanipour, P., Heffernan, M.J. & King, A.G.S. Single-level fusion without decompression for high-grade spondylolithesis in adolescents: a novel surgical strategy. Spine Deform 9, 1457–1464 (2021). https://doi.org/10.1007/s43390-021-00352-0
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DOI: https://doi.org/10.1007/s43390-021-00352-0