Autoimmune Pancreatitis

Abstract
Autoimmune pancreatitis is a form of chronic pancreatitis characterized by an autoimmune inflammatory process that may involve the biliary ducts, bowel, regional lymph nodes, and sometimes the lung and kidney. Patients with this uncommon form of pancreatitis may present with an obstructing pancreatic mass that mimics pancreatic cancer but responds to corticosteroid treatment. This review summarizes how the diagnosis of autoimmune pancreatitis can be established on the basis of imaging, histologic, and serologic criteria.