60-year-old female with periosteal bone formation seen on recent radiograph No evidence of fracture is visualized. There is patchy red marrow signal within the proximal femurs and pelvis. A lobulated fluid collection extends within the iliopsoas bursa. A small amount of fluid is also present within the joint. There is moderate joint space narrowing, consistent with moderate osteoarthritis. Foci of subchondral signal abnormality in the femoral head are considered likely degenerative in etiology. There is no evidence of avascular necrosis. The labrum is poorly visualized on this non-arthrographic exam.
1. Moderate degenerative changes as described above without fracture or dislocation.2. Left iliopsoas bursa fluid collection and small amount of fluid within the hip joint. Note that in approximately 15% of asymptomatic patients the iliopsoas bursa communicates with the joint. 