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. 2021 Aug 17;46(11):5086–5094. doi: 10.1007/s00261-021-03224-3

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© The Author(s) 2021

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/.

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Fig. 3 — a–d Chronic inflammation with presacral fluid collection. a–c Axial T2-weighted/axial diffusion-weighted/axial T1-weighted contrast-enhanced MRI. MRI showing a presacral, partially T2-hyperintense lesion with a thick hypointense rim and partially restricted diffusion, fluid-level and contrast enhancement of the rim. MRI was scored as equivocal (score 2). d/e Corresponding PET and PET/MRI fusion images demonstrating slightly increased FDG-uptake presacrally. PET/MRI was scored as equivocal (score 2). Follow-up of more than 4 years excluded tumor recurrence