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논문 기본 정보

자료유형
학술저널
저자정보
Maruyama Toshiaki (Hiroshima University Hiroshima Japan) Nakamae Toshio (Hiroshima University) Kamei Naosuke (Hiroshima University) Tanaka Nobuhiro (Department of Anesthesiology Nara Medical University Nara Japan) Fujiwara Yasushi (Hiroshima University Hiroshima Japan) Harada Takahiro (Hiroshima University Hiroshima Japan) Adachi Nobuo (Hiroshima University)
저널정보
대한척추외과학회 Asian Spine Journal Asian Spine Journal Vol.17 No.2
발행연도
2023.4
수록면
365 - 372 (8page)
DOI
10.31616/asj.2022.0017

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Study Design: A retrospective cohort study.Purpose: We aimed to investigate the surgical results of foramen magnum decompression (FMD) to identify the potential factors associated with syrinx reduction in Chiari malformation type I (CMI).Overview of Literature: The predictive value of preoperative factors for syrinx reduction in patients with CMI remains debatable.Methods: We enrolled patients who underwent microscopic FMD with outer dural layer resection for CMI. The distance from the tip of the cerebellar tonsil to the C2 vertebral endplate on sagittal magnetic resonance imaging (MRI) was defined as the tonsillar distance (TD). Patients who showed a >20% syrinx diameter reduction on the 1-year follow-up MRI were defined as the syrinx reduction group while the others were categorized in the syrinx nonreduction group. Patients with syringomyelia were categorized into the clinically improved and unimproved groups using the Chicago Chiari Outcome Scale. The imaging and clinical parameters were evaluated pre- and postoperatively.Results: This study included 25 patients of whom 19 (76.0%) had syringomyelia. At the 1-year follow-up, the syrinx diameter had decreased in 11 patients (57.8%). The increased TD significantly differed between the syrinx reduction and nonreduction groups. At the 1-year follow-up, 12 and seven patients with syringomyelia were categorized into the clinically improved and unimproved groups, respectively. The clinically improved and unimproved groups showed significant differences in the mean age and increased TD.Conclusions: Postoperative syrinx reduction was significantly correlated with the upward shifting of the cerebellar tonsil in patients with CMI. Our quantitative evaluation of the alterations in hindbrain position after FMD was easily performed and reflects the clinical outcomes.

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