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. 2018 May 31;12:152. doi: 10.1186/s13256-018-1615-1

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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.

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Fig. 2 — Findings obtained by endoscopic ultrasound-guided fine-needle aspiration. a Endoscopic ultrasound-guided fine-needle aspiration was performed to obtain cytology for the solid mass in the pancreatic head. b Histology showed pleomorphic large atypical cells (hematoxylin-eosin, magnitude × 400). c Cytokeratin AE1/AE3 stain was positive, and thus these cells were epithelial cells (cytokeratin AE1/AE3, magnitude × 400)