DESCRIPTION:
Right femoral head demonstrates interval loss of height and increased sclerosis with marginal irregularity, consistent with osteonecrosis. A focal lucency is present overlying the right femoral epiphysis, potentially secondary to proximal femoral epiphyseal collapse and/or joint effusion. The right acetabulofemoral joint space is slightly wider than the left. Possible effusion of right hip joint as suggested by mild asymmetric lateral convex displacement of the fat plane around the joint.