A 17-year-old boy presents with a head-to-toe non-blanching rash that began on his chest and spread rapidly over 3 days. Non-pruritic; mild discomfort. Low fever; recent URI. No allergies; other PMH, noncontributory. Vitals, WNL.

What's your diagnosis?

A. Viral exanthem

B. Stevens-Johnson syndrome

C. Allergic reaction (urticaria)

D. Meningococcemia (less likely with blanching rash)

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Head-to-Toe Rash on a 17-year-old Boy

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