Case Presentation: A previously healthy 19-year-old woman presented to the emergency department with one week of abdominal pain, bloody diarrhea, and fever. Two weeks prior, she reported a non-specific flu-like illness. On admission, she was febrile, tachycardic, and hypotensive. She had a toxic appearance and a firm, diffusely tender abdomen. She had no oropharyngeal, pulmonary, [...]