Infant who fell out of bed Pediatric Imaging Musculoskeletal December 5, 2020November 23, 2020 CXR AP (above) from initial skeletal survey was unremarkable. Repeat CXR AP (below) from follow-up skeletal survey 2 weeks later shows interval development of periosteal reaction around the left 8th-9th ribs posteriorly. The diagnosis was healing left 8th-9th posterior rib fractures in a child abuse patient. Related Published December 5, 2020November 23, 2020