Department of Radiology, The 12839Jikei University School of Medicine, Japan.
Neuroradiol J. 2021 Oct;34(5):401-407. doi: 10.1177/1971400921998970. Epub 2021 Mar 3.
In daily clinical practice, the assessment of the thickness of the cauda equina on lumbar spine magnetic resonance imaging is an important parameter. However, its relevance to the size of the dural sac in non-pathological conditions is unknown. To examine the relationship between the size of the dural sac and the apparent thickness of the cauda equina nerve root using lumbar spine magnetic resonance imaging in non-pathological conditions.
We retrospectively measured the dural sac diameter and vertebral body diameter, counted the apparent number, and calculated total cross-sectional area of the cauda equina, dural sac ratio and the area of one apparent nerve root of cauda equina in 100 cases. Spearman's rank correlation coefficient () was used.
Dural sac ratio and diameter were positively correlated with the area of one apparent nerve root (=0.77, <0.001; =0.74, <0.001; respectively) and negatively correlated with the apparent number of cauda equina in a single cross-section (=-0.63, <0.001; =-0.52, <0.001; respectively).
A larger dural sac ratio and diameter was associated with an apparently thicker cauda equina and lower visible number. In a larger dural sac, the physiologically clumped and apparently thicker cauda equina should not be misdiagnosed as pathological.
在日常临床实践中，评估腰椎磁共振成像中的马尾厚度是一个重要的参数。然而，其在非病理状态下与硬脑膜囊大小的相关性尚不清楚。本研究旨在检查非病理条件下，硬脑膜囊大小与马尾神经根表观厚度之间的关系。
我们回顾性地测量了 100 例患者的硬脑膜囊直径和椎体直径，计算了马尾的表观数量和总横截面积、硬脑膜囊比和单个横截面上一个表观马尾神经根的面积。采用 Spearman 秩相关系数（）进行分析。
硬脑膜囊比和直径与单个横截面上一个表观马尾神经根的面积呈正相关（=0.77，<0.001；=0.74，<0.001；分别），与单一切面可见的马尾神经根数量呈负相关（=-0.63，<0.001；=-0.52，<0.001；分别）。
较大的硬脑膜囊比和直径与表观上较厚的马尾和较低的可见数量相关。在较大的硬脑膜囊中，生理性聚集和表观上较厚的马尾不应误诊为病理性的。
