Clinical Practice and Cases in Emergency Medicine

A seven-year-old girl presented to the pediatric emergency department with three days of nonbloody, nonbilious vomiting, nonbloody diarrhea, and decreased oral intake. She also had weight loss and fatigue over the preceding month. The examination showed persistent tachycardia despite antipyretics and fluids. This presentation addresses the many causes of persistent tachycardia in a child with a diagnostic test sent from the emergency department revealing the ultimate diagnosis.