Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan.
Division of Radiological Technology, Medical Satellite Yaesu Clinic, Tokyo, Japan.
Childs Nerv Syst. 2021 Jan;37(1):147-152. doi: 10.1007/s00381-020-04707-2. Epub 2020 Jun 5.
The present study aimed to explore the subependymal layers overlying the cerebral ventricles using magnetic resonance imaging.
A total of 69 outpatients underwent constructive interference in steady-state (CISS) sequence in thin-sliced, coronal, and sagittal sections.
The subependymal layers were delineated as linear hyperintensities, coursing along the outer margins of the ventricular walls. On coronal images, the hyperintensities surrounding the anterior horn of the lateral ventricle were identified in 97% of patients, while those of the third ventricle were identified in 96% of patients. In the trigone and posterior horn of the lateral ventricle, the hyperintensities were delineated in all patients. On sagittal images, subependymal hyperintensities were identified in all. At the level of the anterior horn and third ventricle, the subependymal hyperintensities were found to communicate with the Virchow-Robin spaces (VRSs) in 68% and 65% of patients, respectively. At the level of the trigone and posterior horn of the lateral ventricle, the VRSs communicated with the subependymal hyperintensities in 83% of patients.
Subependymal hyperintensity may represent an inflow passage of the VRSs that jointly contribute to efficient transependymal migration of the interstitial fluid into the ventricular cerebrospinal fluid.
本研究旨在利用磁共振成像探讨覆盖脑室内的室管膜下层。
共有 69 名门诊患者接受了薄切片冠状位和矢状位的稳态构建干扰（CISS）序列检查。
室管膜下层呈线性高信号，沿脑室壁的外边缘延伸。在冠状位图像上，97%的患者可识别侧脑室前角周围的高信号，96%的患者可识别第三脑室周围的高信号。在侧脑室三角区和后角，所有患者均能勾画室管膜下高信号。在矢状位图像上，所有患者均可见室管膜下高信号。在前角和第三脑室水平，分别有 68%和 65%的患者发现室管膜下高信号与脉络丛间隙（VRS）相通。在侧脑室三角区和后角水平，83%的患者 VRS 与室管膜下高信号相通。
室管膜下高信号可能代表 VRS 的流入通道，共同促进间质液通过室管膜下有效地迁移到脑室脑脊液中。
