A 60-year-old Hispanic man with a history of insulin-dependent diabetes mellitus presented for six days of abdominal pain, nausea, and vomiting. Broadly, his symptoms can be categorized into two initial diagnostic categories: gastrointestinal etiologies or a gastrointestinal manifestation of systemic disease. The differential diagnosis of gastrointestinal etiologies can be subcategorized by organ, for example: peptic ulcer disease, pancreatitis, small bowel obstruction, biliary obstruction, acute hepatitis … Download the full article below.