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.
Surg Radiol Anat. 2021 Aug;43(8):1311-1318. doi: 10.1007/s00276-021-02719-4. Epub 2021 Feb 26.
Few studies have explored arachnoid granulations (AGs) bulging into the cranial dural sinuses using contrast-enhanced magnetic resonance imaging (MRI). This study aimed to explore such AGs in the transverse (TS), sigmoid (SigS), and straight (StS) sinuses, and confluens sinuum (ConfS) using thin-sliced, contrast MRI.
A total of 102 patients with intact dural sinuses underwent thin-sliced, contrast MRI in the axial, coronal, and sagittal planes.
In 88.2%, more than one AG was identified in the TS and SigS, StS, and ConfS. In the TS, AGs were identified in 40.2% on the right side and 37.3% on the left and were frequently located in the middle and lateral thirds. In the SigS, AGs were identified on the right in 17.6% and on the left in 18.6% in the distal region. In the StS, AGs were identified in 35.3% of cases, most frequently located in the proximal third, followed by the distal third. In the ConfS, AGs were identified in 20.6% of cases. Furthermore, in 23.5%, a collection of multiple AGs of varying sizes was found in the TS. A statistical difference was not shown between the mean age of 90 patients with AGs and that of 12 patients without identifiable AGs.
Bulging AGs may more frequently found in the TS. Thin-sliced, contrast MRI is useful for delineating AGs.
很少有研究使用对比增强磁共振成像（MRI）来探索蛛网膜颗粒（AGs）向颅硬脑膜窦膨出。本研究旨在使用薄层对比 MRI 来探索横窦（TS）、乙状窦（SigS）和直窦（StS）以及总窦（ConfS）中的这些 AGs。
共 102 例硬脑膜窦完整的患者在轴位、冠状位和矢状位进行薄层对比 MRI。
在 88.2%的患者中，TS、SigS、StS 和 ConfS 中均发现多个 AG。在 TS 中，右侧发现 AG 的比例为 40.2%，左侧为 37.3%，常位于中、外侧三分之一。在 SigS 中，右侧有 17.6%，左侧有 18.6%的患者在远侧发现 AG。在 StS 中，35.3%的患者发现 AG，最常见于近侧三分之一，其次是远侧三分之一。在 ConfS 中，20.6%的患者发现 AG。此外，在 23.5%的患者中，TS 中发现了多个大小不一的 AG 集合。有 AG 的 90 例患者的平均年龄与无可识别 AG 的 12 例患者的平均年龄之间没有统计学差异。
膨出的 AGs 可能更常出现在 TS 中。薄层对比 MRI 有助于描绘 AGs。
