IgG4-related Autoimmune Pancreatitis Mimicking Acute Pancreatitis: A Case Report

摘要

IGG4-RELATED autoimmune pancreatitis (AIP) is themost common type of IgG4-related diseases. Theobservation of a diffused and localized enlargementof the pancreas and strictures in the main pancreaticduct on radiological imaging is essential fordiagnosing AIP. The clinical features of AIP which presentas a localized pancreatic mass greatly mimic pancreaticcancer. Cases with AIP mimicking pancreatic cancer arereported numerously. However, cases of IgG4-related AIPmanifesting acute pancreatitis symptoms and extensiveperipancreatic effusion are rarely observed. Meanwhile,acute pancreatitis is a common disease. If misdiagnosed asacute pancreatitis, IgG4-related AIP may progressseriously. Here, we report a rare case of IgG4-related AIPsuspected of acute pancreatitis because of epigastric painand extensive peripancreatic effusion on computed tomography(CT) images.