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. 2017 Dec 19;36:95. doi: 10.1186/s40880-017-0265-9

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© The Author(s) 2017

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. 1 — A 35-year-old man with a SCLN of 7.5 mm (arrow) in left level IIb was diagnosed with T3N0 nasopharyngeal cancer by MRI (a), but diagnosed with T3N1 disease by PET/CT (b). SCLN small cervical lymph node, MRI magnetic resonance imaging, PET/CT positron emission tomography/computed tomography