Figure 28.

Synovial chondromatosis. A) Coronal proton density (PD) fat-saturated (FS) magnetic resonance (MR) image demonstrating synovitis (arrows) with multiple low signal foci in keeping with mineralised joint bodies. B) Axial PD FS MR image demonstrating florid synovial hypertrophy with distension of the iliopsoas bursa (short arrow). Note heterogeneous signal within the synovium suggesting the diagnosis of synovial chondromatosis. There is severe erosion of the femoral neck resulting in a classical “apple core” deformity (long arrows)