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. 2017 Jun 6;7:2877. doi: 10.1038/s41598-017-03296-6

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© The Author(s) 2017

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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The upper row shows a 62-year-old male suffering from an adenocarcinoma of the upper right lobe. LN station 10 according to Mountain and Dresler¹ was classified as a true positive case (a,b,c,d). The lower row shows a 59-year-old male suffering from a squamous cell carcinoma of the lower left lobe. The increased focal ¹⁸F-Alfatide uptake in PET/CT imaging is an example of false positive lymph node metastasis (e,f,g,h).