MSFinals-4556

MSFinals-4556

A 2-year-old girl is brought to the emergency department by her father due to pain in her left hip and a new limp. She has no past medical history except for a recent cold she had 2 weeks ago, from which she has recovered. There is no history of trauma to the hip. Her developmental milestones have been normal so far.

Upon examination, she is not running a fever. She tolerates slight movement of her left hip, but excessive motion causes her to cry.

The following investigations were conducted:
– Hemoglobin (Hb) level: 125 g/L (normal range for females: 110-140)
– Platelet count: 220 * 109/L (normal range: 150 – 400)
– White blood cell (WBC) count: 9.5 * 109/L (normal range: 4.0 – 11.0)

What is the most appropriate next step in managing this patient?