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. 2016 Aug 3;16:20. doi: 10.1186/s40644-016-0075-3

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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. 6 — Patient with adenoid cystic carcinoma and perineural extension along the inferior orbital nerve, the pteryopalatine fossa and the maxillary nerve on the left side. Contrast enhanced CT images a, b showing the asymmetric thickened enhancing nerve (arrows) on the left. The curved arrow a shows the normal fat density of the pterygopalatine fossa on the right side. Axial T1-weighted images d, e showing the thickened enhancing nerve (arrows) on the left. Coronal T1-weighted images with fat saturation after injection of gadolinium c showing asymmetrical nerve enhancement (arrow) in the cavernous sinus and f the thickened infraorbital nerve on the left (arrow)