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. 2020 Jul 14;20:48. doi: 10.1186/s40644-020-00328-9

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 3 — Thickening of subcutaneous facia. Observer score variation within the skull due to thickening of subcutaneous fascia (arrows) shown by (a) axial b900 DW MRI and (b) axial in-phase Dixon MRI. High diffusion signal leads to a false positive report of a skull lesion (arrow a), in-phase Dixon images show the lesion to not be within the skull and instead relate to thickening of subcutaneous facia (arrow b). Synonymous to this we also found sub-occipital lymph nodes can lead to false positive reporting of focal lesions within the skull