Managing Dysfunctions and Reinterventions in Endoscopic Ultrasound-Guided Choledochoduodenostomy with Lumen Apposing Metal Stents: an illustrated technical review (with videos).

Endoscopic ultrasound-guided choledochoduodenostomy (EUS-CDS) with lumen apposing metal stent (LAMS) is emerging both as a rescue strategy and a primary treatment for distal malignant biliary obstruction (dMBO). The large-scale diffusion of the procedure and improved overall survival of patients with pancreatobiliary neoplasms is resulting in a growing population of long-term EUS-CDS LAMS carriers. Recent studies have reported a need for reintervention during follow-up as higher as 55%, and the Leuven-Amsterdam-Milan Study Group (L.A.M.S) Classification has been developed, identifying 5 mechanisms of stent dysfunction and 11 possible rescue strategies aimed at restoring biliary drainage. This illustrated technical review aims to further dissect the recent classification through a comprehensive analysis of nine illustrative cases, offering insights into the pathophysiology underlying dysfunction and clinical reasoning behind rescue interventions, as well as technical considerations and practical tips and tricks. By exploring mechanisms of dysfunction, this review also assists clinicians in selecting the ideal candidates for EUS-CDS while identifying patients deemed high risk for dysfunction or clinical failure.