
A 20-month-old boy brought to the emergency department with swelling on the right side of the neck and fever (temperature, 39.3°C [102.7°F]) of 1 day’s duration. The parents reported that the child had had intermittent fevers and poor weight gain for the past 3 months but no vomiting, diarrhea, rash, drooling, or difficulty in swallowing.













