Question

11yo male presents to pediatrician with a 3 week history of a painful left hip. He and his parents denies any inciting or traumatic event and he denies fever, chills, recent illness, or past symptoms. On physical examination, he has a noticeable limp and you elicit pain with passive internal rotation of the hip. Radiograph is below.

1. What is the main risk factor for this condition?
2. What radiographic abnormality is seen?
3. What is the management of this condition?
4. What is the most serious adverse event associated with this condition?