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Does pedicle screw fixation under age 5 cause spinal canal narrowing? A CT study with minimum 5 years follow-up

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Abstract

Purpose

The aim of this retrospective study was to evaluate the changes in the vertebral body and spinal canal area in a group of patients who had pedicle screw fixation under age 5 for the treatment of congenital spinal deformity at least 5 year follow-up.

Methods

11 patients who had been operated due to spinal deformity under age 5 with who had a CT examination at least 5 years after the initial operation were included in the study. All patients underwent hemivertebrectomy and transpedicular fixation procedures at an average age of 3.18 years (range 2–5 years). All had preoperative CT to evaluate the congenital deformities. Measurements were done at the instrumented vertebrae as well as the un-instrumented ones above and below them to evaluate; vertebral body parameters, pedicle parameters and spinal canal area of upper instrumented vertebra (UIV), lower instrumented vertebra (LIV), upper adjacent un-instrumented vertebra and lower adjacent un-instrumented vertebra.

Results

The average follow-up was 7.2 (range 5–12) years. Six of the patients were over age 10 during the final CT examination while 5 were at age 7. Female-to male ratio was 8–3. Measurement of all the parameters in 22 instrumented and 22 non-instrumented segments showed a proportional increase rather than a decrease at each segment. The percentage of canal area growth at UIV and LIV was 21 and 17.5 %, respectively.

Conclusion

Pedicle screw instrumentation has no adverse effect on further spinal body, pedicle and canal growth and does not result in iatrogenic spinal canal stenosis.

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Authors and Affiliations

  1. Department of Orthopaedics and Traumatology, Istanbul Bilim University Faculty of Medicine, Abide-i Hurriyet Cad. No:166 Sisli, 34381, Istanbul, Turkey

    Sinan Kahraman

  2. Department of Neurosurgery, Florence Nightingale Hospital, Istanbul, Turkey

    Selhan Karadereler

  3. Department of Orthopaedics and Traumatology, Adnan Menderes University Faculty of Medicine, Merkez Kampusu Aytepe Mevkii, 09100, Aydin, Turkey

    Mutlu Cobanoglu

  4. Department of Orthopaedics and Traumatology, Erzurum Ataturk University Faculty of Medicine, Vani Efendi Mah.Yakutiye, 2540, Erzurum, Turkey

    Sinan Yilar

  5. Department of Radiology, Florence Nightingale Hospital, Abide-i Hurriyet Cad. No:166 Sisli, 34381, Istanbul, Turkey

    Ayhan Mutlu & Levent Onur Ulusoy

  6. Istanbul Spine Center, Florence Nightingale Hospital, Abide-i Hurriyet Cad. No:164 Sisli, 34381, Istanbul, Turkey

    Selhan Karadereler & Azmi Hamzaoglu

Authors
  1. Sinan Kahraman
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  2. Selhan Karadereler
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  3. Mutlu Cobanoglu
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  4. Sinan Yilar
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  5. Ayhan Mutlu
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  6. Levent Onur Ulusoy
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  7. Azmi Hamzaoglu
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Corresponding author

Correspondence to Sinan Kahraman.

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Additional information

This study was performed at Istanbul Spine Center, Florence Nightingale Hospital, Istanbul, Turkey.

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Kahraman, S., Karadereler, S., Cobanoglu, M. et al. Does pedicle screw fixation under age 5 cause spinal canal narrowing? A CT study with minimum 5 years follow-up. Eur Spine J 25, 1665–1673 (2016). https://doi.org/10.1007/s00586-016-4484-6

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  • DOI: https://doi.org/10.1007/s00586-016-4484-6

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