School ager with wrist pain after a fall on an outstretched hand Pediatric Imaging Musculoskeletal March 10, 2022March 30, 2022 AP (left) and lateral (right) radiographs of the forearm show a diaphyseal lesion that is expansile and lytic in appearance with a narrow zone of transition and no periosteal reaction. The diagnosis was a unicameral bone cyst. Related Published March 10, 2022March 30, 2022