An Unusual Adverse Event Caused by Migrated Lumen-Apposing Metal Stent – A Case Report

Lumen-apposing metal stents have carved their niche as an effective drainage option for symptomatic peripancreatic fluid collections. Unlike plastic stents which can be left in situ for prolonged periods, metal stents need to be removed after a period of 4-6 weeks as timely non-removal can lead to adverse events. Lumen-apposing metal stents being metallic, have mechanical eroding property. Post drainage of fluid component, metallic flanges/ends of such stents can impinge upon and erode the wall of fluid collections. This can result in migration outside of cyst cavity, invasion/impingement of adjacent vessels and viscera and subsequent adverse events. Here we are reporting one such unusual adverse event resulting from non-removal of lumen-apposing metal stent, where the stent migrated and caused proximal small bowel stricture.