A Case of Autoimmune Pancreatitis Presenting as a Deterioration in Glycemic Control in a Patient with Pre-Existing Type 2 Diabetes

The present article demonstrates an unusual case of type 1 autoimmune pancreatitis (AIP), focusing on the cause of deterioration in glycemic control and weight loss in a patient with pre-existing type 2 diabetes mellitus (DM). A 67-year-old man was diagnosed with type 2 DM 23 years prior and presented with weight loss of approximately 6 kg over a period of 3 months and hemoglobin A1c (HbA1c) of 9.1%. His carbohydrate antigen 19-9 (CA 19-9) level...