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. 2016 Jul 16;16:106. doi: 10.1186/s12883-016-0620-5

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© The Author(s). 2016

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. 2 — Routine MRI displaying NVC may have different intra-operative findings. a The superior cerebellar artery (SCA, red arrow) and a vessel (yellow arrow) located at the lateral of TGN (blue arrow) were the suspected vessels of NVC. b Intra-operative image showed SCA was close to but not in touch with TGN. A trivial vessel (vein) crawled on TGN. The white arrow points to the gap of the SCA and TGN. c MRI revealed the SCA (red arrow) and another vessel (yellow arrow) each formed a loop conflicting TGN (blue arrow) from inner side and outside. d Intra-operative image showed both vessels did not compress TGN (correspondingly marked with red and yellow arrow). A vein (white arrow) compressed the TGN from lower, outside at REZ to the TGN surface. e A very tiny vessel was displayed by pre-operative MRI at the outside of REZ of left TGN (blue arrow) which was easily neglected (red arrow). f An artery was found compressing the REZ of left TGN during surgery (white arrow)