Infant with respiratory distress

CXR and specimen radiograph of mesenchymal hamartoma of the chest wall
CXR AP and lateral (above) show a cystic expansile lesion arising from the posterior aspect of the right 8th rib causing distortion of the adjacent bony thorax. Specimen radiograph (below) shows the partially calcified soft-tissue mass arising from the rib.

The diagnosis was mesenchymal hamartoma of the chest wall.