A 60-year-old man presented to the emergency department (ED) with fever of 1 day’s duration and midabdominal pain. The cramping pain had begun 3 days earlier in a bandlike distribution around the upper abdomen. Ingestion of food exacerbated the discomfort. The patient had a history of intermittent constipation; he denied alcohol or illicit drug use, nausea, vomiting, and weight loss. He did not use any herbal or over-the-counter medications.