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. 2023 Sep 26;11(27):6424–6430. doi: 10.12998/wjcc.v11.i27.6424

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©The Author(s) 2023. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/

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Case 1. A: An ulcerated lesion was revealed in the lesser curvature of the lower corpus; B: Abnormal lymphoid cells were densely proliferating in the lamina propria; C: The upper panel shows CD20 immunostaining, and the lower panel shows CD79a immunostaining. Both were clearly positive; D: Seven months after Helicobacter pylori eradication, the ulcerated lesion regressed; E: Scattered infiltration of small lymphocytes in the lamina propria was observed. A and D: Endoscopic findings of the stomach; B, C, and E: Microscopic findings (B and E; hematoxylin eosin staining, scale bar = 100 μm).