To Evaluate Early (2-Week) vs. Standard (4-Week) Metal Stent Removal Following Endoscopic Ultrasound Guided WON Drainage

Inclusion Criteria: * Age ≥18 years * Patients with walled-off pancreatic necrosis (WON) undergoing endoscopic ultrasound-guided drainage with lumen-apposing metal stent (LAMS) * Radiological resolution of the pancreatic fluid collection ≥70% at 2 weeks after index endoscopic drainage, assessed on cross-sectional imaging (CT or MRI) Exclusion Criteria: * Presence of chronic pancreatitis * Pancreatic malignancy (suspected or confirmed) * Incomplete endoscopic necrosectomy or persistent large necrotic debris on imaging at 2 weeks after drainage * Occurrence of major procedure-related adverse events within the first 2 weeks, including: * Clinically significant bleeding * Infection requiring additional intervention * Stent migration * Inability or unwillingness to provide written informed consent