Spontaneous fistulization of walled‐off pancreatic necrosis
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A 17‐year‐old girl presented with 2‐month history of epigastric pain. She also complained of an abdominal lump for the past few days. She had been under treatment for severe acute pancreatitis at an outside hospital. On examination, she was ill‐looking, febrile, tachycardic with a normal blood pressure. An abdominal examination revealed central abdominal distension with a localized peritonism. X‐ray abdomen revealed a large radiolucent opacity in central part of the abdomen displacing bowel loops at the periphery, with a large volume air‐fluid level (Figure 1). On further confirmation with computed tomography abdomen, it showed a walled‐off pancreatic necrosis (WOPN) with a massive air density (Figure 2). Image‐guided percutaneous catheter drain was placed in the WOPN, which initially drained air with feculent content (Figure 2) and then the pancreatic necrosum suggesting spontaneous colonic fistulization.

Fistulization of the gastrointestinal tract (GI) is an uncommon complication of necrotizing pancreatitis. It generally occurs following interventions or rarely spontaneously. The presence of air in WOPN suggests infection, but when large‐volume air is seen, it suggests fistulization. Rarely, due to the massive air, it can present with an abdominal lump, where the diagnosis can be clinched from the simple abdominal X‐ray, as seen in this case.

Source: https://onlinelibrary.wiley.com/doi/full/10.1002/ccr3.2946?af=R
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