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. 2020 Sep 3;11:100. doi: 10.1186/s13244-020-00890-7

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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/.

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Fig. 5 — The mesorectal fascia may present with gaps, particularly anterolaterally (arrows in a). It is a multilayered envelope and as such multiple hypointense lines may be apparent (arrows in b). Anteriorly, in between the neurovascular bundles, extending from the peritoneal reflection down to the pelvic floor, the mesorectal fascia is juxtaposed to the Dennonvillier fascia (between red arrows in c and d). Posteriorly, it is juxtaposed to the presacral fascia (blue arrows in d). Sometimes, the presacral compartment is divided by the Waldeyers fascia (arrow in e) into superior and inferior compartments. Inferiorly, the mesorectal fascia tappers and is “lost” within the intersphincteric plane (arrows in f)