Abstract
Type 2 autoimmune pancreatitis (AIP) is a recognized complication of ulcerative colitis (UC), whereas type 1 AIP-an immunoglobulin G4-related sclerosing pancreatitis-is uncommon in this patient population and typically presents in older males. We present a case of recurrent pancreatitis in an 18-year-old male with UC. Investigations revealed elevated immunoglobulin G4 levels and images demonstrating diffuse pancreatic strictures and parenchymal enlargement, consistent with type 1 AIP. The patient showed a favorable response to glucocorticoid therapy. This case highlights a potential new association between AIP and UC and emphasizes early recognition and treatment.