School ager with knee pain Pediatric Imaging Musculoskeletal March 1, 2022March 30, 2022 AP (left) and oblique (right) radiographs of the knee show a metaphyseal lesion that is lytic and lobulated and expansile in appearance with a narrow zone of transition and no periosteal reaction. The diagnosis was chondromyxoid fibroma. Related Published March 1, 2022March 30, 2022