Male 50 years old; Reason: Right hip pain, PET scan showed hypermetabolic soft tissue activity associated with a significant right hip joint History: Right hip pain There is serpiginous low T1 and low T2 signal extending across the superior aspect of the right femoral head, compatible with osteonecrosis. There is mild associated edema-type signal within the bone, without articular surface collapse or fracture. A small joint effusion is present, with enhancement of the joint capsule compatible with synovitis. No enhancing osseous or soft tissue lesions are seen. There is patchy low T1 signal throughout the visualized bones compatible with reconverted red marrow. A similar, though smaller, focus of signal abnormality is seen in the superior left femoral head on the large field of view STIR images, likely also representing osteonecrosis.
1. Osteonecrosis of the bilateral femoral heads, right worse than left, without articular surface collapse.2. Small right hip joint effusion, with enhancement of the joint capsule compatible with synovitis. 