<prompt> A 40 yr. old male patient on long-term steroid therapy for a systemic disease presents with recent onset of severe pain in the right hip. The imaging modality of choice for this problem is?MRI scanCT scanBone scanPlain X-ray  <response>: Ans. A. MRI scan MRI is the preferred imaging modality in this case. This is a case scenario of recent onset of severe hip pain with a history of long-term steroid therapy suggesting the diagnosis of AVN avascular necrosis hip. MRI is the investigation of choice for AVN hip. 