A six year old boy presents to the emergency depament with a painful limp. Clinical examination reveals tenderness in the femoral triangle and some limitation of hip movements. An X-ray was done which was normal. Which of the following should be the next course of action?

Painful limp in a six year old boy with limitation of hip movements and tenderness in the groin region confirms a diagnosis of Pehe's disease. MRI is the investigation of choice to include/exclude a diagnosis of Pehe's disease. Ref: A practical guide to pediatric emergency in medicine: caring for children in the emergency depament, by N. Ewen Amieva Wang, Jamie Shandro, Page 490.