Preschooler with respiratory distress

CXR and CT of pleuropulmonary blastoma
CXR AP (above) shows complete opacification of the right hemithorax with mediastinal shift to the left. Axial CT with contrast of the chest shows a large mass filling the entire right hemithorax that is solid peripherally and cystic centrally, causing mediastinal shift to the left.

The diagnosis was pleuropulmonary blastoma.