Migratory Acute Necrotic Collection Mimicking Pancreatic Cancer: A Case Report

Pancreatic necrosis is associated with pancreatic fluid collection. According to the revised Atlanta classification, fluid collection occurs in acute interstitial or necrotic pancreatitis. Fluid collections resulting from pancreatic necrosis are called acute necrotic collections, which occur within a month of maturity, are generally less organized, and have a non-coherent structure. Acute necrotic collections may progress to walled-off necrosis. The diagnosis of acute necrotic collection of the pancreas is rare in patients without a history of acute pancreatitis. We report a rare case in which a patient presenting with weight loss and abdominal pain was examined under the suspicion of pancreatic cancer but was diagnosed with acute necrotic collection. After recovery of an acute necrotic collection in the head of the pancreas with conservative treatment, another infected acute necrotic collection developed in the tail of the pancreas, and the patient underwent interventional treatment.