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. 2019 Aug 29;9:12582. doi: 10.1038/s41598-019-49057-5

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© The Author(s) 2019

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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A 60-year-old man with history of lung cancer. Old tuberculosis lesions were seen at the apex of both lungs, and a metastatic lymph node can be seen beside the trachea. After 5 months of chemotherapy, the PET/CT follow-up showed that the volume of old tuberculosis in the left apex pulmonis increased, and the SUVmax increased from 2.6 to 7.5 (white arrow); the paratracheal high metabolism lymph node volume was reduced and metabolism was essentially disappeared (black arrow). After 4 months of anti-tuberculosis treatment, the PET/CT follow-up showed that the metabolism of hypermetabolic tuberculosis decreased, but the volume of metastatic lymph nodes increased slightly and metabolism increased again.