Pancreatogenic diabetes presenting with diabetic ketoacidosis: A rare manifestation of chronic pancreatitis.

Diabetes mellitus (DM) is a clinical syndrome that is manifested by hyperglycemia. Out of the numerous causes of diabetes, an uncommon cause is chronic pancreatic disease due to destruction of islet cells. Diabetic ketoacidosis is a rare entity in such cases as alpha cells are destroyed along with beta cells, which causes lack of glucagon that is responsible for ketogenesis. We hereby report a case of a 55-year-old woman with history of gall stone disease and who presented to the emergency department with multiple episodes of non-bilious, non-blood mixed vomiting along with increased frequency of micturition on background of malaise and anorexia along with significant weight loss. Her capillary blood glucose was 501 mg/dl, arterial blood gas showed high anion gap metabolic acidosis, and urine ketone were largely positive. Thus, she was diagnosed with diabetic ketoacidosis. She was admitted to the high dependency unit and her condition was treated along the lines of diabetic ketoacidosis. Further evaluation showed high HbA1c values without previous history of diabetes and computed tomography of the abdomen revealed presence of chronic pancreatitis. Though being a rare entity, this case outlines that DM3c can present with diabetic ketoacidosis (DKA); thus, early diagnosis and management are crucial to prevent mortality.