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. 2018 Jun 4;13:136. doi: 10.1186/s13018-018-0849-3

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© The Author(s). 2018

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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Fig. 4 — a Epiduroscopic image shows a laser electrode inserted into the cystic mass (white arrow) and the confirmed mass (black arrow). b Epiduroscopic image shows a laser electrode inserted into the cystic mass (white arrow); after decompression, cerebrospinal fluid was expelled and the cyst decompressed (black arrow). c T2-weighted axial magnetic resonance (MR) image shows the inflated cyst containing cerebrospinal fluid and occupying the spinal canal (white arrow). d Post-operative MR image shows the released dural sac and deflated Tarlov cyst (white arrow)