Case Presentation: A 68-year-old male with history of IgG4-related autoimmune pancreatitis presented to the Emergency Department with a one-month history of generalized weakness and a 25 lb unintentional weight loss over the past three months. Labs were notable for elevated lactate (3.4 mmol/L), new thrombocytopenia (platelets 29 ×10^9/L), and a stage II acute kidney injury [...]