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MRI criteria for diagnosis and predicting severity of carpal tunnel syndrome.
Skeletal Radiology ( IF 2.1 ) Pub Date : 2019-08-09 , DOI: 10.1007/s00256-019-03291-0
Alex W H Ng 1 , James F Griffith 1 , Cina S L Tong 1 , Eric K C Law 1 , W L Tse 2 , Clara W Y Wong 2 , P C Ho 2
Affiliation  

OBJECTIVE To study MRI criteria for diagnosing and predicting severity of carpal tunnel syndrome (CTS). METHODS Sixty-nine wrists in 41 symptomatic CTS patients and 32 wrists in 28 asymptomatic subjects were evaluated by MRI. Circumferential surface area (CSA), flattening ratio, relative median nerve signal intensity, and retinacular bowing were measured. CTS severity was classified as mild, moderate, or severe. Parameters for patients with and without CTS and for the three severity groups were compared. ROC curves were plotted to assess accuracy for CTS diagnosis and severity prediction. RESULTS Significant differences were found between CTS and control wrists for median nerve CSA, flattening ratio at inlet, relative median nerve signal intensity, and retinacular bowing. ROC curve analysis revealed a sensitivity, specificity, and accuracy of median nerve CSA > 15 mm2 proximal to the tunnel (CSAp) of 85.5, 100, and 90.1%. Using either CSAp or CSAd > 15 mm2 as a diagnostic criterion, MRI could achieve a sensitivity of 100% and specificity of 94% for diagnosis of CTS while overall accuracy was 98%. Significant differences were found among the three severity groups. Sensitivity, specificity, and accuracy of prediction of severe CTS using for CSAp > 19 mm2 were 75.0, 65.9, and 69.6%, respectively. CONCLUSIONS MRI is highly accurate at diagnosing CTS and moderately accurate at determining CTS severity. We recommend using CSA > 15 mm2 either proximal to or distal to the tunnel as a diagnostic criterion for CTS and CSA > 19 mm2 proximal to the tunnel as a marker for severe CTS.

中文翻译:

用于诊断和预测腕管综合症严重程度的MRI标准。

目的研究MRI标准以诊断和预测腕管综合症(CTS)的严重程度。方法对41例有症状的CTS患者的69只手腕和28例无症状的受试者的32只手腕进行MRI检查。测量周表面积(CSA),展平率,相对中位神经信号强度和视网膜弯曲。CTS严重程度分为轻度,中度或严重。比较了有或没有CTS的患者以及三个严重程度组的参数。绘制ROC曲线以评估CTS诊断和严重性预测的准确性。结果在CTS和控制腕之间,在正中神经CSA,入口处扁平率,相对中神经信号强度和视网膜弯曲方面存在显着差异。ROC曲线分析显示出敏感性,特异性,靠近隧道的正中神经CSA> 15 mm2(CSAp)的准确性为85.5%,100%和90.1%。使用CSAp或CSAd> 15 mm2作为诊断标准,MRI诊断CTS可以达到100%的灵敏度和94%的特异性,而总准确度为98%。在三个严重程度组之间发现了显着差异。用于CSAp> 19 mm2的严重CTS预测的灵敏度,特异性和准确性分别为75.0、65.9和69.6%。结论MRI在诊断CTS方面非常准确,而在确定CTS严重程度方面则中等。我们建议在隧道近端或远端使用CSA> 15 mm2作为CTS的诊断标准,在隧道近端使用CSA> 19 mm2作为严重CTS的标志。使用CSAp或CSAd> 15 mm2作为诊断标准,MRI诊断CTS可以达到100%的灵敏度和94%的特异性,而总准确度为98%。在三个严重程度组之间发现了显着差异。用于CSAp> 19 mm2的严重CTS预测的灵敏度,特异性和准确性分别为75.0、65.9和69.6%。结论MRI在诊断CTS方面非常准确,而在确定CTS严重程度方面则中等。我们建议在隧道近端或远端使用CSA> 15 mm2作为CTS的诊断标准,在隧道近端使用CSA> 19 mm2作为严重CTS的标志。使用CSAp或CSAd> 15 mm2作为诊断标准,MRI对CTS的诊断灵敏度可以达到100%,特异性可以达到94%,而总准确度则可以达到98%。在三个严重程度组之间发现了显着差异。用于CSAp> 19 mm2的严重CTS预测的灵敏度,特异性和准确性分别为75.0、65.9和69.6%。结论MRI在诊断CTS方面非常准确,而在确定CTS严重程度方面则中等。我们建议在隧道近端或远端使用CSA> 15 mm2作为CTS的诊断标准,在隧道近端使用CSA> 19 mm2作为严重CTS的标志。在三个严重程度组之间发现了显着差异。用于CSAp> 19 mm2的严重CTS预测的灵敏度,特异性和准确性分别为75.0、65.9和69.6%。结论MRI在诊断CTS方面非常准确,而在确定CTS严重程度方面则中等。我们建议在隧道近端或远端使用CSA> 15 mm2作为CTS的诊断标准,在隧道近端使用CSA> 19 mm2作为严重CTS的标志。在三个严重程度组之间发现了显着差异。用于CSAp> 19 mm2的严重CTS预测的灵敏度,特异性和准确性分别为75.0、65.9和69.6%。结论MRI在诊断CTS方面非常准确,而在确定CTS严重程度方面则中等。我们建议在隧道近端或远端使用CSA> 15 mm2作为CTS的诊断标准,在隧道近端使用CSA> 19 mm2作为严重CTS的标志。
更新日期:2020-01-21
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