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Radiographic Features of Extraforaminal Entrapment of the Fifth Lumbar Spinal Nerve. Comparison between Far-out Syndrome with Lateral Disc Herniation Keigo Ito 1 , Yasutsugu Yukawa 1 , Yumiko Horie 2 , Hiroaki Nakashima 1 , Masaaki Machino 1 , Fumihiko Kato 1 1Department of Orthopedic Surgery, Chubu Rosai Hospital 2Department of Orthopedic Surgery, Nagoya Kyoritsu Hospital Keyword: ファーアウト症候群 , far-out syndrome , 外側型椎間板ヘルニア , lateral disc hernia , 椎間孔外障害 , extraforaminal entrapment pp.1237-1241
Published Date 2009/12/25
DOI https://doi.org/10.11477/mf.1408101644
  • Abstract
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 Lumbar disc herniation and lumbar spinal canal stenosis are common causes of lumbar radicular pain, and extraforaminal entrapment of the fifth lumbar spinal nerve is an easily overlooked cause. Lateral disc hernia at L5/S (L5/S L-LDH) and far-out syndrome (FOS) were contained for the extraforaminal entrapment of the fifth lumbar spinal nerve. We investigated the radiographic characteristics of FOS 〔distance between the L5 transverse process and ala of the sacrum (T-A distance〕, L5, L4 tilt angle, and L1-S1 Cobb angle by comparing the values in an L5/S L-LDH group as a control group. The L5 vertebra was tilted toward the symptomatic side and the L1 vertebra was tilted to the other side.


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電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院

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