Figure 1. Plain radiograph (A) and magnetic resonance imaging (MRI) (B–D) of the right shoulder. (A) Plain radiograph of shoulder shows lytic bone lesions (yellow arrow), multiple juxta-articular and subchondral cystic lesions (geodes), with well-defined sclerotic margins (black arrow). The joint space width is normal. (B) MRI with axial T1-weighted imaging (T1W), (C) sagittal T2-weighted fat-suppressed imaging (T2FS), and (D) axial T1W imaging after contrast (T1C+) show multiple nodular deposition in synovial membrane of an abnormal soft tissue that have the low signal intensity on T1W, intermediate signal intensity on T2FS, peripheral enhancement on T1C+ (white arrow). These substances also fill the subchondral defects (yellow arrow) and extend to periarticular soft tissue (yellow star).