Case Presentation: A 15-year-old previously healthy female presented with 2 days of fatigue and 1 day of vomiting, watery diarrhea, and dark urine. Labwork revealed a hyponatremic, hypokalemic metabolic acidosis with acute kidney injury. Despite copious electrolyte and fluid resuscitation, her diarrhea persisted, with stool output peaking at 14 liters per day. She exhibited severe [...]