Whole circumferential endoscopic submucosal dissection of superficial adenocarcinoma in long-segment Barrett's esophagus: A case report

Figure 5 An endoscopic submucosal dissection en-bloc resected specimen and histological tumor distribution. The superficial carcinoma consisted of papillary and well-differentiated tubular adenocarcinoma in the protruded and elevated positions and extensive flat portions, respectively. The adenocarcinoma lesion extended the whole circumference of the long-segment Barrett’s esophagus and was confined to the superficial muscularis mucosae.