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. 2013 May 31;46(3):280–283. doi: 10.5946/ce.2013.46.3.280

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Copyright © 2013 Korean Society of Gastrointestinal Endoscopy

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3 — Pathologic findings. (A) It shows a well-differentiated adenocarcinoma and a neuroendocrine carcinoma. One area of transition between the two histologic types was observed (H&E stain, ×200). (B) The tumor cells with endocrine differentiation are highlighted by CD 56 stain, but adenocarcinoma shows no immunoreactivity (CD 56 stain, ×40). (C) The tumor cells with endocrine differentiation are highlighted by synaptophysin stain, but adenocarcinoma shows no immunoreactivity (synaptophysin stain, ×40).