An unexpected complication of prophylactic esophageal stenting: esophageal stent impaction after thread dislocation.

A 47-year-old woman was referred to our department with opportunistic endoscopic findings of two submucosal esophageal bulges, approximately half the circumference of the esophagus, both nearly 2.0 cm in size, and 24-27 cm from the incisors. Ultrasound endoscopy diagnosed smooth muscle tumors originating from the muscularis propria layer and she next underwent submucosal tunneling endoscopic resection. Intraoperatively, part of the tumor could not be separated from the muscularis propria layer and a U-shaped tumor was finally resected. A fully covered self-expanding esophageal nitinol stent was then inserted, covering the full circumference esophageal mucosa. The stent was fixed by ears with knotted thread and proton pump inhibitors were given for 1 week.