63-year-old female. Left hip pain, on chronic prednisone. Evaluate for AVN. ACETABULAR LABRUM: Limited evaluation of the labrum without intra-articular gadolinium. There is intermediate signal intensity in the anterior superior labrum consistent with degeneration.ARTICULAR CARTILAGE AND BONE: Serpiginous T1 hypointense line with confluent central T1/T2 hypointensity involving nearly the entire subchondral bone of the left femoral head consistent with avascular necrosis. There is associated articular surface collapse indicating it is advanced. There is edema type signal in the bone from the neck to the intertrochanteric region, likely secondary to the above described avascular necrosis.There is also early avascular necrosis affecting the right femoral head with serpiginous T1 hypointensity and central fat signal intensity. It involves approximately 25% of the articular surface without associated subchondral collapse.SOFT TISSUES: No significant abnormality noted. ADDITIONAL
Bilateral femoral head avascular necrosis, advanced on the left with articular collapse.