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. 2020 Jun 24;18:255. doi: 10.1186/s12967-020-02414-9

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© The Author(s) 2020

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. 4 — Similar Histological Features Shared by All PDX Tissues and the Original Patient PDAC Tumors. The original poorly differentiated PDAC tumors from patients were histologically compared with their derived Patient 1275 PDX Tissue (a) or Patient 1319 PDX Tissue (b). Both PDX tissues were respectively passaged and expanded subcutaneously three times in the same mouse through incomplete resection, then engrafted and expanded orthotopically one time in the pancreatic tail of another mouse. Pictures were taken at magnifications indicated using an Olympus™ BX51 microscope