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. 2022 Sep 28;22:1021. doi: 10.1186/s12885-022-10114-4

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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/. 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. — Immunohistochemistry. Immunohistochemistry (IHC) of CD47 expression in SGC tissues. Upper row shows 200x magnification images, lower row shows 400x magnification images. Representative images show CD47 expression with negative score in tumor cells (black arrow), and score 2 positivity in tumor-infiltrating immune cells (red arrow) in adenoid cystic carcinoma; CD47 expression with score 3 positivity in tumor cells (black arrow), score 3 positivity in tumor-infiltrating immune cells (red arrow) and negativity in stroma (black arrowhead) in acinic cell carcinoma; CD47 expression with score 2 positivity in tumor cells (black arrow), score 3 positivity in tumor-infiltrating immune cells (red arrow) and positivity in ductal epithelium (black arrowhead) in salivary duct carcinoma; CD47 expression with score 2 positivity in tumor cells (black arrow), score 3 positivity in tumor-infiltrating immune cells (red arrow) and negativity in adipose tissue (black arrowhead) in adenocarcinoma NOS; CD47 expression in tumor cells (black arrow) and tumor-infiltrating immune cells (red arrow) in mucoepidermoid carcinoma