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. 2021 Sep 16;12:130. doi: 10.1186/s13244-021-01072-9

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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. 11 — 27-Year-old female with 14 mm PTC in left isthmus of thyroid gland. The nodule has a right angle/obtuse angle contact with the trachea which suggests a high risk of invasion into trachea. In addition, there is gross ETE noted anteriorly with disruption of the echogenic line and tumor extension to the strap muscles (arrowhead). The patient was not offered AS in our study and underwent surgery