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. 2019 Mar 20;19:16. doi: 10.1186/s40644-019-0204-x

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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. 2 — a 47-year-old male with a PTMC lesion in whom conventional ultrasound examination showed a 7.8 mm × 6.8 mm × 4.3 mm hypoechoic nodule. b After PLA, CEUS revealed a hypoechoic area in the original area, along with some debris in the centre that presented as strong echoes, which demonstrated that the lesion had been completely ablated. c Six months after PLA, conventional ultrasound examination showed a 7.1 mm × 3.2 mm × 2.1 mm hyperechoic nodule. d Eighteen months after PLA, conventional ultrasound examination showed that the lesion had completely disappeared