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. 2021 Nov 10;21:424. doi: 10.1186/s12876-021-02010-1

Fig. 3.

Fig. 3

Esophagogastroduodenoscopy. a At the time of duodenal ulcer diagnosis, esophagogastroduodenoscopy findings revealed an A1 ulcer on the lower wall of the duodenal bulb. b Three months after Helicobacter pylori treatment, esophagogastroduodenoscopy findings indicated healing of the duodenal ulcer and scarring