{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T08:08:16Z","timestamp":1753862896648,"version":"3.41.2"},"reference-count":25,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2024,8,6]],"date-time":"2024-08-06T00:00:00Z","timestamp":1722902400000},"content-version":"vor","delay-in-days":5,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clinical Case Reports"],"published-print":{"date-parts":[[2024,8]]},"abstract":"<jats:sec><jats:title>Key Clinical Message<\/jats:title><jats:p>Serosal overturning assisted endoscopic full\u2010thickness mucosal resection was performed on the extraneous giant masses at the esophagogastric junction without complications.<\/jats:p><\/jats:sec><jats:sec><jats:title>Abstract<\/jats:title><jats:p>It is difficult to perform endoscopic resection of masses at the gastroesophageal junction (GEJ). In particular, the extraneous giant masses surrounding the extraneous giant masses is infrequent. As one of the technologies of endoscopic resection, endoscopic full\u2010thickness resection (EFTR) is generally applicable to the submucosal tumor of stomach, duodenum and colorectal that originate from the musculus propria and protrude to subserous or partial growth outside the luminal layer. Successful endoscopic repair of perforation is crucial in avoiding the need for surgical repair and preventing postoperative peritonitis, making it a key aspect of EFTR treatment. We report a 56\u2010year\u2010old woman who was admitted to our department complaining of 5\u2010year history of masses of esophagogastric junction and 2\u2010month history of feeling of gastric distension. Gastroscopy showed a 4\u2009cm submucosal mass near the fundus of the stomach from the cardia. Computed tomography scan revealed submucosal lesions in esophagogastric junction, which was exogenous. We successfully performed Serosal overturning assisted endoscopic full\u2010thickness mucosal resection on the extraneous giant masses at the esophagogastric junction without complications. The clinical symptoms were significantly improved within postoperative 1\u2009month. There was no recurrence 8\u2009months after the operation. Serosal overturning assisted EFTR is possibly an effective and minimally invasive method of extraneous giant masses at the esophagogastric junction.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ccr3.9226","type":"journal-article","created":{"date-parts":[[2024,8,6]],"date-time":"2024-08-06T08:45:50Z","timestamp":1722933950000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Serosal overturning assisted endoscopic full\u2010thickness mucosal resection of extraneous giant mass at the esophagogastric junction"],"prefix":"10.1002","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2507-6274","authenticated-orcid":false,"given":"Shumin","family":"Qin","sequence":"first","affiliation":[{"name":"Department of Gastroenterology The Second Affiliated Hospital of Guanzhou University of Chinese Medicine  Guangzhou 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