Unexpected clipping failure of a full-thickness resection device during endoscopic full-thickness resection

Endoscopic full-thickness resection (EFTR) using a full-thickness resection device (FTRD; Ovesco Endoscopy AG, Tübingen, Germany) has emerged as an effective and safe technique for nonlifting colonic lesions, such as residual polyps after EMR.1 A high technical success rate has been reported.2–7 However, reports of technical failure, such as misdeployment of clipping, are insufficient. Here we describe a case of FTRD clipping failure and our troubleshooting management.