Approach to viral exanthems (pediatrics) Quiz: Ace Your Exams
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A 9-month-old boy is brought to the pediatrician for a new-onset rash. His parents report that he had a 3-day history of fever up to 40°C (104°F). The fever broke 24 hours ago, and this morning, the patient woke up with the rash. It does not appear to be painful or pruritic. The parents report no new exposures such as new soaps, lotions, or detergents. There have been no known contacts with a similar rash. The patient has a very mild runny nose but no other symptoms of an upper respiratory infection. He was seen in the office 2 days ago for the fever and was diagnosed with a viral illness at that time. The parents report he is eating and drinking well, with good urine output. Since the fever subsided, the patient has been active and playful. He was born full-term, and there is no significant past medical history. Temperature is 37°C (98.6°F), pulse is 128/min, respirations are 32/min, blood pressure is 85/50 mmHg, and oxygen saturation is 100% on room air. On physical examination, the patient is alert and happy. The anterior fontanelle is open and flat. There is mild rhinorrhea. The oral mucosa and oropharynx are within normal limits. Cardiopulmonary examinations are normal. Given the most likely etiology for the rash, which of the following would best describe the likely rash?
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