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. 2018 Nov 2;9(6):925–941. doi: 10.1007/s13244-018-0663-9

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© The Author(s) 2018

Open Access This 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.

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Fig. 2 — a, b Usual CT appearance of a trocar access site following uncomplicated laparoscopic cholecystectomy. Axial (a) and coronal (b) images show a tubular non-enhancing hypodense structure (arrows) crossing through the mildly thickened left rectus abdominis muscle. This normal finding should be differentiated from c, which is an intraparietal abscess (arrows in c) developing within the right external and internal oblique muscles following laparoscopic trocar access and manifesting with local swelling