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In this study we analyzed the feasibility and safety of single-step multiple transluminal gateway drainage (MTGD) for complex walled-off necrosis (WON) using lumen-apposing metal stents (LAMSs). Six patients underwent endoscopic ultrasound (EUS)-guided MTGD using two LAMSs. Technical success was 100%. The mean procedure time was 29 min. The mean number of direct endoscopic necrosectomy sessions per patient was 2. Two of six patients developed adverse events, which was bleeding in both cases and treated endoscopically and surgically, respectively. The mean hospital stay was 52.5 days. No patients had residual necrosis or WON recurrence. Although the limited number of patients, the single-step MTGD using electrocautery-LAMSs can be considered a feasible and well-tolerated treatment option for patients with complex WON. Nevertheless, larger randomized controlled studies are needed in order to confirm our data and better define the advantages of this technique.

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