ABSTRACT
A 5-year-old girl is brought to the emergency department with a complaint of bilateral lower leg pain for the past 2 days. There is a history of intermittent fever 1 week ago for 4 days, maximum temperature to 38.9°C. She had rhinorrhea, cough, and vomiting for 4 days at the start of her illness but these symptoms have resolved. The leg pain has increased in severity. Last night she refused to walk without assistance, prompting the visit to the emergency department.
