Multiple snares-assisted endoscopic full-thickness resection of a giant submucosal tumor at the esophagogastric junction

A 26-year-old woman presented to our hospital with intermittent dysphagia lasting 1 month. A contrast-enhanced computed tomography (CT) scan revealed a low-density accumulation at the esophagogastric junction, extending from the mediastinum to the abdominal cavity ([Fig. 1] a). Endoscopic examination displayed a large submucosal bulge with a smooth mucosal surface, located 31 cm from the incisors ([Fig. 1] b). Three-dimensional reconstruction techniques were utilized to assess the size and pinpoint the precise location of the lesion ([Fig. 1] c). Endoscopic ultrasound confirmed its origin from the muscularis propria, showing hypoechoic changes ([Fig. 1] d).