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- Jayson R. Baman, MD*,†
- Nathaniel T. Townsand, MD‡
- Parker Hill, MD‡
- Ayesa Mian, MD‡
- *University of Rochester School of Medicine and Dentistry, Rochester, NY
- †Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- ‡Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, NY
AUTHOR DISCLOSURE
Drs Baman, Townsand, Hill, and Mian have disclosed no financial relationships relevant to this article. This commentary does not contain a discussion of an unapproved/investigative use of a commercial product/device.
Presentation
A previously healthy 8-year-old girl is referred to the emergency department for acute-onset diarrhea with abdominal pain. This illness began 2 days earlier with coryza, nonproductive cough, and subjective fever, for which she took ibuprofen. She denies a change in urine output, mental status changes, headache, nausea, and emesis. She has not had recent travel. Her only home medication is a fiber supplement for chronic constipation. All immunizations are up to date except for the annual influenza vaccine.
In the emergency department, her temperature is 104.2°F (40.1°C), heart rate is 77 beats/min, respiratory rate is 27 breaths/min, and oxygen saturation is 99% on room air. She was hypertensive, with a blood pressure of 117/81 mm Hg. She is pale, alert, cooperative, and not toxic-appearing. There is no periorbital edema or tonsillar enlargement, but palatine petechiae are present. Respirations are clear and unlabored. She is in regular rhythm without murmurs or gallops. Her abdomen is soft and nondistended, with normoactive bowel sounds. She is mildly tender in the right upper quadrant. She has a significant number of pretibial petechiae extending to the dorsa of her feet, and she demonstrates appropriate strength and muscle tone, with normal reflexes throughout.
Initial laboratory findings are significant for creatinine level, 1.12 mg/dL (99.01 μmol/L); hematocrit level, 28%; platelet count, 9×103/μL (9×109/L); …
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