A nurse in a pediatric clinic is assessing four children who present with hip or knee pain. Which child requires priority intervention?

An 8-year-old with intermittent knee pain after soccer practice

A 13-year-old overweight adolescent with sudden hip pain and the affected leg externally rotated

A 5-year-old with mild hip pain following a recent upper respiratory infection and a low-grade fever

A 6-year-old with a painless limp for 2 months and limited hip abduction