平山病颈椎自然位及屈颈位的MR I诊断  

MRI diagnosis of Hirayama diseases under the conventional position and flexion position

作　　者：陈天忠[1] 李治[2] 唐建桥[1] 程旭坚 

机构地区：[1]广西科技大学第一附属医院放射科,广西柳州545002 [2]云南省第一人民医院放射科

出　　处：《实用放射学杂志》2014年第7期1100-1102,1111,共4页Journal of Practical Radiology

摘　　要：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。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.

关 键 词：平山病 磁共振成像 自然位 曲颈位 

分 类 号：R741[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]