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. 2022 Apr 28;127(5):800–810. doi: 10.1038/s41416-022-01819-1

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© The Author(s) 2022

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. 1 — The enrichment and subsequent expansion of CTCs have many translational applications. The analysis of these cells as CTC lines or xenografts can expand our comprehension of the metastatic process and lead to the identification of new biomarkers and/or pathways to propose potential new therapies against cancer. Moreover, an innovative functional approach, called EPIDROP, can help to study single viable CTCs directly from a blood sample. The analysis of viable CTCs might open the opportunity to test drugs in real time in vitro to evaluate therapy sensitivity/resistance: the oncogram.