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(A and B) Endoscopic images of a typical missed cancer: (A) Slightly depressed lesion is found on the anterior wall of the gastric lower body. After endoscopic resection, the lesion was to be signet ring cell type intramucosal gastric cancer of 5 mm in size. (B) The previous endoscopic images 26 months prior had not included the same location of this lesion.
