Femoral head avascular necrosis (FHAVN)
Patient with history of hip trauma years ago, now complains of left hip pain and limited mobility.
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Abnormal bone marrow signal intensity of the superior medial aspect of the femoral head (weight bearing area). It elicits persistent low signal on both T1WI and T2WI. Flattening of the femoral head.
Mild widening of joint space.
Left hip joint effusion.
45 year old male with history of hip trauma described left hip pain. MRI shows abnormal T1/T2 WI low signal intensity involving most of the left femoral head as well as a small joint effusion. No evidence of secondary osteoarthritic changes or narrowed joint space. MRI findings suggest advanced AVN of the left femoral head.