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. 2020 Nov 13;6:287. doi: 10.1186/s40792-020-01067-6

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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/.

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Fig. 5 — Histopathological findings of the resected specimen. Invasive growth of proliferated spindle-shaped cells in the pancreatic tumor. Hyalinized fibrosis is present at the periphery of the tumor (× 100) (a). The tumor showed high cellularity, increased mitotic figures (12/10 HPFs), and nuclear pleomorphism (increased N/C ratio) (× 200) (b). Tumor infiltration was observed on the duodenal side in contact with the main lesion (c). Immunohistochemically, the tumor cells were positive for CD34 (× 200) (d) and Bcl-2 (× 200) (e), and weakly positive for STAT6 (× 200) (f)