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. 2023 Jul 6;42:160. doi: 10.1186/s13046-023-02714-0

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© The Author(s) 2023

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 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/. 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 in a credit line to the data.

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Fig. 1 — The increasing number of CAF positively correlates with the upregulation of mesenchymal phenotype of LECs in CSCC. A Staining for α-SMA (CAF marker) and LYVE-1 (lymphatic marker) in serial sections of CSCC specimens. The lymphatic vessels are indicated by red arrows. B Representative images of LYVE-1 (green) and α-SMA (red) fluorescence staining in CSCC (20 samples with LNM; 37 samples without LNM) under 400 × magnification. Blue indicates the nucleus. C Correlations between CAFs and lymphatic vessel density were analysed. D The correlation between α-SMA⁺LYVE-1⁺ vessels and CAFs (α-SMA marker). E The correlation between α-SMA⁺LYVE-1.⁺ vessels and lymphatic vessel density. *p < 0.05