颈椎自然位MRI对平山病的诊断价值

目的：探讨平山病(HD)颈椎自然位 MRI 的表现及其诊断价值,提高 HD MRI 诊断水平。方法观察15例 HD 患者及40例对照组自然位颈椎 MRI 特征,分析其特异性及灵敏性,并测量低位脊髓矢状径/脊髓横径(CSD/CTD)比值。结果病例组低位颈髓 CSD/CTD 与对照组差异有统计学意义(t=7.99,P =0.00)。LOA 的灵敏性为86.7%,特异性为88.4%。低位颈髓萎缩的灵敏性80.0%,特异性79.5%。脊柱曲线异常灵敏性40.0%,特异性65.2%。髓内异常信号灵敏性46.7%,特异性87.5%。硬膜腔外异常信号灵敏性20.0%,特异性96.8%。结论 HD 低位颈髓自然位 MRI 具有一定特征性,结合临床症状和体征对诊断HD 具有重要临床价值。

Value of natural position of cervical vertebra using MRI in diagnosis of Hirayama disease

Objective To analyze the MRI features of Hirayama disease(HD)with cervical natural position and its diagnostic val-ue.Methods The natural position of cervical vertebra with MRI examination was used in 1 5 patients and 40 normal people.The spe-cificity and sensitivity of MRI features were analyzed and the ratio of cervical sagittal diameter/cervical transverse diameter (CSD/CTD)of the lower cervical cord was measured.Results CSD/CTD of the patients and control group had a significant difference (t=7.99,P =0.00).The sensitivity of LOA was 86.7%,and its specificity was 88.4%.The sensitivity of atrophy of the lower cervical cord was 80.0%,and its specificity was 79.5%.The sensitivity of the cervical spine curvature abnormalities was 40.0%,and its spe-cificity was 65.2%.The sensitivity of abnormal signal in the spinal cord was 46.7%,and its specificity was 87.5%.The sensitivity of abnormal signal in the epidural outer cavity was 20.0%,and its specificity was 96.8%.Conclusion MRI features of lower cervical cord in combination with clinical symptoms and signs can be helpful for the accurate diagnosis of HD.