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. 2021 May 16;9(14):3356–3364. doi: 10.12998/wjcc.v9.i14.3356

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©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/

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After lumbar puncture, blood was dissolved. Four days after the initial bleeding, non-contrast computed tomography (CT) showed the typical pattern of perimesencephalic spontaneous subarachnoid hemorrhage (SAH). A: After lumbar puncture, blood was dissolved; B: CT shows blood was dissolved; C: The typical pattern of perimesencephalic SAH; D: The typical pattern of perimesencephalic SAH.