Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Oct 9;6(15):CASE23343.
doi: 10.3171/CASE23343. Print 2023 Oct 9.

Two-year results of single-level fixation with lateral mass screws for cervical degenerative spondylolisthesis: patient series

Hiroyasu Kodama, Naohiro Kawamura, Junichi Ohya, Yuki Onishi, Chiaki Horii, Mitsuhiro Nishizawa, Masaya Sekimizu, Yuji Ishino, Junichi Kunogi

Two-year results of single-level fixation with lateral mass screws for cervical degenerative spondylolisthesis: patient series

Hiroyasu Kodama et al. J Neurosurg Case Lessons. .

Abstract

Background: In surgery for cervical spondylotic myelopathy (CSM) with spondylolisthesis, there is no consensus on the correction and fixation for spondylolisthesis. The authors retrospectively studied whether the correction of single-level fixation with lateral mass screws (LMSs) could be maintained.

Observations: The records of patients with CSM with spondylolisthesis who had been treated with posterior decompression and single-level fusion with LMSs from 2017 to 2021 were retrospectively reviewed. Radiographic measurements included cervical parameters such as C2-7 lordosis, T1 slope, and the degree of spondylolisthesis (percent slippage) before surgery, immediately after surgery, and at the final observation. Ten cases (mean age 72.8 ± 7.8 years) were included in the final analysis, and four cases (40%) were on hemodialysis. The median observation period was 26.5 months (interquartile range, 12-35.75). The mean percent slippage was 16.8% ± 4.7% before surgery, 5.3% ± 4.0% immediately after surgery, and 6.5% ± 4.7% at the final observation. Spearman's rank correlation showed a moderate correlation between preoperative slippage magnitude and correction loss (r = 0.659; p = 0.038). Other parameters showed no correlation with correction loss.

Lessons: For CSM with spondylolisthesis, single-level fixation with LMSs achieved and maintained successful correction in the 2-year observation.

Keywords: cervical spondylolisthesis; lateral mass screw; single-level fixation.

PubMed Disclaimer

Conflict of interest statement

Disclosures The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this paper.

Figures

FIG. 1
FIG. 1
Slippage percentage (% slip) is the ratio of the overhanging part of the superior vertebral body (B) to the diameter of the inferior vertebral body (A).
FIG. 2
FIG. 2
Radiographs from a case on hemodialysis (81-year-old female): preoperative (A), immediately after surgery (B), and 1 year after surgery (C).
See this image and copyright information in PMC

Similar articles

See all similar articles

References

    1. Lannon M, Kachur E. Degenerative cervical myelopathy: clinical presentation, assessment, and natural history. J Clin Med. 2021;10(16):3626. - PMC - PubMed
    1. Nouri A, Martin AR, Tetreault L, et al. MRI analysis of the combined prospectively collected AOSpine North America and international data: the prevalence and spectrum of pathologies in a global cohort of patients with degenerative cervical myelopathy. Spine (Phila Pa 1976) 2017;42(14):1058–1067. - PubMed
    1. Jiang SD, Jiang LS, Dai LY. Degenerative cervical spondylolisthesis: a systematic review. Int Orthop. 2011;35(6):869–875. - PMC - PubMed
    1. Dean CL, Gabriel JP, Cassinelli EH, Bolesta MJ, Bohlman HH. Degenerative spondylolisthesis of the cervical spine: analysis of 58 patients treated with anterior cervical decompression and fusion. Spine J. 2009;9(6):439–446. - PubMed
    1. Kopacz KJ, Connolly PJ. The prevalence of cervical spondylolisthesis. Orthopedics. 1999;22(7):677–679. - PubMed