Teenager with bilateral knee pain Pediatric Imaging Musculoskeletal January 22, 2022December 9, 2021 AP (above) and lateral (below) radiographs of the knees show knee joint capsular distension due to dense effusions (left > right), periarticular osteopenia, joint space narrowing, subchondral cysts and epiphyseal overgrowth. The diagnosis was hemophilia. Related Published January 22, 2022December 9, 2021