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Walled-off necrosis (WON) is a serious complication to necrotizing acute pancreatitis with a high morbidity and mortality. The aim of this study was to investigate the long-term changes in pancreatic function, metabolic function and body composition in patients with WON. Observational study including patients with WON who underwent endoscopic transmural drainage and necrosectomy. Patients were prospectively evaluated at baseline, 3–6 months after discharge, and 12 months after discharge. Patients were characterized with fecal elastase, blood samples, computer tomography, dual energy X-ray absorptiometry and Lundh’s test. The study includes 17 patients (11 men) with WON. The etiologies were gallstones (53%) alcohol intake (35%) and 12% had an unknown etiology. The body mass index (BMI) dropped during baseline and 3 months after discharge ( p  = .03) and increased 12 months after discharge ( p  = .002). Twelve months after discharge, 29% had mild exocrine insufficiency, 7% moderate insufficiency and 50% severe insufficiency based on the Lundh’s test. Fecal elastase was &lt;100 μg/g in 35% and &lt;200 μg/g in 59% 12 months after discharge. Only, 24% required pancreatic enzyme substitution. Endocrine insufficiency developed in 24%. These patients also had exocrine insufficiency. A considerable proportion of patients with WON experience both endocrine and exocrine pancreatic insufficiency suggesting that long-term follow-up is needed in order to ensure adequate treatment.

Long-term changes of pancreatic function in patients with complicated walled-off necrosis