Simulated lateral tunneling for treating a huge submucosal tumor at the cervical esophagus

A 43-year-old man was referred to our hospital for treatment of a huge submucosal tumor adjacent to introitus esophagus identified by surveillance endoscopy ([Fig. 1] a). An enhanced computed tomography demonstrated a marked submucosal tumor measuring 2.6 × 8 cm, protruding intra- and extraluminally ([Fig. 1] b). After multidisciplinary team discussion and sufficient informed consent, endoscopic resection with simulated lateral tunneling was scheduled to remove this mass ([Video 1]).