Saylisoy Suzan, Simsek Sevtap, Adapinar Baki
From the Department of Radiology, Faculty of Medicine, Eskisehir Osmangazi University, Meselik-Eskisehir, Turkey.
J Comput Assist Tomogr. 2014 Jan-Feb;38(1):33-5. doi: 10.1097/RCT.0b013e3182a9a45a.
Perivascular spaces (PVSs) surrounding the walls of arteries, arterioles, and venules do not directly communicate with subarachnoid spaces. There are a few reports exhibiting subarachnoid hemorrhage (SAH) and intracerebral hematomas extending to the PVSs by leakage of the leptomeninges that surround arteries. In this report, we present 4 patients of whom 3 had SAH extending into the PVSs in the bilateral basal ganglia and 1 had extension of contrast medium to the PVSs after injection of the contrast medium into the lumbar subarachnoid space. The hemorrhage extending to the PVSs in our 3 patients with SAH could be explained by leakage of the leptomeninges surrounding the arteries. However, how the contrast medium extends to the PVSs is not clear. We think that, although speculative, incomplete or complete defect at the leptomeninges surrounding the arteries resulting in direct continuity between the subarachnoid space and the PVS allows that blood or contrast media to extend to the PVSs.
动脉、小动脉和小静脉壁周围的血管周围间隙（PVSs）不直接与蛛网膜下腔相通。有一些报告显示蛛网膜下腔出血（SAH）和脑内血肿通过围绕动脉的软脑膜渗漏延伸至PVSs。在本报告中，我们展示了4例患者，其中3例SAH延伸至双侧基底节的PVSs，1例在将造影剂注入腰蛛网膜下腔后造影剂延伸至PVSs。我们3例SAH患者中出血延伸至PVSs可通过围绕动脉的软脑膜渗漏来解释。然而，造影剂如何延伸至PVSs尚不清楚。我们认为，尽管具有推测性，但围绕动脉的软脑膜存在不完全或完全缺损，导致蛛网膜下腔与PVS直接连续，使得血液或造影剂能够延伸至PVSs。
