CT morphometric analysis of the cervical spinal canal with special reference to the correlation with the vertebral level

Hitoshi Yamahata, Takaaki Hiwatari, Masanori Yonenaga, Masanao Mori, Tadaaki Niiro, Jun Sugata, Tomohisa Okada, Satoshi Yamaguchi, Koji Yoshimoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Background: Narrowness of the spinal canal is associated with the development of cervical myelopathy. While studies have addressed the sagittal diameter of the cervical spinal canal, few evaluated the correlation between the size of the spinal canal and the vertebral level. We addressed this issue. Methods: Our retrospective study included 102 patients with cranial or spinal disorders. We examined the correlation between the cervical spinal canal diameter (SCD) at C1 to C7 and the inner anteroposterior diameter (IAPD) of the atlas on CT images. Results: At C1, the SCD was largest, at C4 it was smallest. While there was a strong correlation between the IAPD and the SCD at C1 (r = 0.8), the correlation between the size of the atlas and the SCD at C4 to C7 was weak (r = 0.2–0.3). We divided our patients into a normal group (n = 34, SCD ≥ 12 mm at any levels) and a stenosis group (n = 68, SCD < 12 mm at all levels). The mean SCD at C2 to C7 was significantly larger in the normal group. There was no significant difference between the two groups with respect to the IAPD and the SCD at C1. Conclusions: The size of the subaxial spine does not necessarily affect the size of the atlas. The pathophysiology of spinal canal stenosis should be considered separately at the C1- and the subaxial level.

Original languageEnglish
Pages (from-to)354-357
Number of pages4
JournalJournal of Orthopaedic Science
Volume26
Issue number3
DOIs
Publication statusPublished - May 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

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