Bronchogenic cysts treated with submucosal tunneling endoscopic resection and natural orifice transluminal endoscopy: Two case reports and review of literature

Figure 3 Intraoperative findings during mediastinal bronchogenic cyst resection (case 2). A: Creation of a submucosal tunnel; no lesion was visible within the submucosal layer; B: Intraoperative endoscopic ultrasonography confirmed the presence of the cyst; C: The cyst wall was exposed following full-thickness myotomy and careful dissection of the muscularis propria; D: The cyst was thin-walled and fragile, containing yellow gelatinous fluid; E: Surgical cavity after complete cyst removal; F: Mucosal entry site securely closed with multiple endoscopic clips (arrow indicates the mucosal entry site).