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. 2019 Aug 19;19:57. doi: 10.1186/s40644-019-0241-5

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© The Author(s). 2019

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. 3 — FDG-PET (a) in a patient with systemic lymphoma shows abnormal intracranial uptake (asterisk), consistent with secondary CNS involvement. This is localised to the hypothalamus on the post-contrast MRI (b). The post-contrast MRI (c) also demonstrates more extensive leptomeningeal disease than is appreciable on PET, including along the ependymal surface of the fourth ventricle (arrow)