CAJ | 학술논문

目的：分析平山病(HD)的 MRI表现,探讨 MRI对平山病的诊断价值。方法对15例经临床及肌电图证实为 HD患者进行颈椎自然位和屈颈位MRI扫描并回顾性分析其表现。结果12例在颈椎自然位MRI见生理曲度变直或反弓,15例均有低位颈髓(C4~C7椎水平)不同程度变细、萎缩；曲颈位均可见背侧硬脊膜囊向前移位,硬膜外间隙增宽及弧形或梭形 T2 WI 异常信号,低位颈髓受压变扁；8例T2 WI后硬膜外间隙见流空信号。结论 HD自然位低位颈髓局限性变扁,萎缩；曲颈位硬脊膜后外间隙T2 WI的高信号及流空信号对本病诊断有重要意义。
목적：분석평산병(HD)적 MRI표현,탐토 MRI대평산병적진단개치。방법대15례경림상급기전도증실위 HD환자진행경추자연위화굴경위MRI소묘병회고성분석기표현。결과12례재경추자연위MRI견생리곡도변직혹반궁,15례균유저위경수(C4~C7추수평)불동정도변세、위축；곡경위균가견배측경척막낭향전이위,경막외간극증관급호형혹사형 T2 WI 이상신호,저위경수수압변편；8례T2 WI후경막외간극견류공신호。결론 HD자연위저위경수국한성변편,위축；곡경위경척막후외간극T2 WI적고신호급류공신호대본병진단유중요의의。
Objective To analyze the MRI appearance of Hirayama disease,and to explore the diagnostic value of MRI in Hiraya-ma disease.Methods MRI data of 15 Hirayama patients confirmed by clinic and electromyogram were retrospectively analyzed.Re-sults The cervical manifestations including straight or kyphotic cervical curvature were found in 1 2 cases.Atrophy and flattering of the lower cervical cord (C4 to C7 level)were found in all 1 5 cases.At flexion position,the anterior shifting of cervical dorsal dural sac,the widened epidural space and abnormal signal intensity component were found in all 1 5 cases.Flow voids in posterior epidural space on T2 weighted images were found in 8 cases.Conclusion Cervical MRI with fully flexion position has significant values on di-agnosis of Hirayama disease.Atrophy and flattening of the lower cervical cord,the anterior shifting of cervical durai sac,the wid-ened epidural space and posterior epidural crescent-shaped component with flow voids on T2 weighted images are valuable in diagno-sis of Hirayama disease.