School ager with chest pain after motor vehicle accident Pediatric Imaging Musculoskeletal October 4, 2023September 21, 2023 CXR AP shows a discontinuity at the lateral aspect of the left second rib. There is a pleural cap at the apex of the left hemithorax. The diagnosis was rib fracture of the second rib. CT of the chest was negative for thoracic aortic injury. Related Published October 4, 2023September 21, 2023