Endoscopic submucosal tunnel dissection for a large esophageal subepithelial leiomyoma to prevent postprocedural stenosis

A 27-year-old man with a huge esophageal leiomyoma, 4.5 cm in size, at the distal esophagus suffered from postprandial belching and chest discomfort. Endoscopic submucosal tunnel dissection was implemented to resect his leiomyoma. His symptoms resolved after tumor resection without any sequelae, such as luminal stricture that often occurs after large-size esophageal lesion resection. Endoscopic submucosal tunnel dissection has been reported to be a useful method for the resection of esophageal submucosal tumors; however, such large-size tumors are rare.