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Walled-off pancreatic necrosis (WOPN) is a major complication of acute pancreatitis. We hypothesized that an extended (2 cm) cystogastrostomy opening combined with hydrogen peroxide irrigation can increase the success of endoscopic necrosectomy and decrease the number of required endoscopic interventions. The aim of the study is to assess the safety and feasibility of the technique in the management of WOPN.Methods   This is a retrospective chart review of all cases that underwent EUS with extended cystogastrostomy and hydrogen peroxide irrigation prior to necrosectomy in a tertiary referral medical center. Clinical success was defined as complete resolution of the cyst cavity or a cyst cavity less than 2 cm in size on follow-up imaging.Results   19 patients satisfied the inclusion criteria. The mean size of the walled-off cavity was 11 + 0.9 cm. Technical success of the procedure was 100%. The median number of necrosectomy sessions was 2 (range 1 to 7). Cavity resolution was noted in 18 out of 19 patients resulting in a clinical success of 94.7%. The median follow-up period was 12 months. The adverse events rate in our cohort was 15.7%.Conclusion   Extended cystogastrostomy coupled with hydrogen peroxide irrigation of WOPN cavity is safe and feasible.

Extended Cystogastrostomy with Hydrogen Peroxide Irrigation Facilitates Endoscopic Pancreatic Necrosectomy