Figure 23. Osteoarthritis of the sternoclavicular joint. (a) T1 weighted image showing hypertrophy of the capsule (arrows) osteophyte and erosion. (b) Short tau inversion recovery coronal image shows a joint effusion and periarticular bony oedema. (c) Axial T1 weighted image demonstrating a prominent palpable mass due to bony and capsular hypertrophy. (C, clavicle.)