A 3-year-old boy comes for his second visit to the hospital. Two days ago, he had presented with a 4-day history of intermittent fever spiking to 104°F (40°C) and irritability. His examination at that time was remarkable for bilateral conjunctivitis, oropharyngeal injection, and red cracked lips. He drank 120 mL of an electrolyte solution in the clinic and was sent home with instructions for symptomatic care. Today he returns with persistent fever and irritability.
Examination suggests that the physical findings noted earlier are still present. In addition, he now has a maculopapular truncal rash, hand and foot edema, and an enlarged but nonsuppurative right anterior cervical lymph node. What is the most likely diagnosis for this patient? NOTE: No other information about the patient is available. (Answer is posted in the comment section below!) *This Case Challenge is from the…
