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. 2015 Jun 26;12:15. doi: 10.1186/s12987-015-0010-1

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© Ishikawa et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Communication of subarachnoid spaces with Virchow–Robin spaces (VRS) in the basal ganglia of a control subject. a Fusion image of coronal plane volume rendering constructive interference in the steady state (CISS) image and magnetic resonance angiography (MRA) image of the basal ganglia. Perivascular CSF spaces were observed around perforating arteries from the M1 portion of the middle cerebral artery (red) in the basal ganglia. They passed upward and then medially to the floor of the lateral ventricle (white arrows). Magnified view of the dotted square (b, c) showed clear continuity of CSF between the subarachnoid space in the basal cistern and VRS in the basal ganglia on CISS (b) and fusion images (c). Observation in a normal 69-year-old man, BG basal ganglia; M1, M2 M1 and M2 portions of the middle cerebral artery; LV lateral ventricle; SF Sylvian fissure, scale bar 5 mm.