Fig. 1. Major adverse events during or after peroral endoscopic myotomy (POEM) that included mucosal injury (A, B), bleeding (C, D), and hemothorax (E-H). Gastric mucosa (cardia) laceration during POEM (A), clipping site mucosal perforation (B), incision site bleeding (C) with exposed vessel (D), chest X-ray performed due to severe chest pain 2 days after POEM and showing mediastinum widening (E), CT scan showing an esophageal rupture with hemothorax (F), endoscopy revealing large submucosal tunnel hematoma (G), immediately after insertion of the chest tube, 700 mL of blood was drained (H).
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