Teenager with respiratory distress and blood coming from the endotracheal tube

CXR and CT of pulmonary hemorrhage
CXR AP (above) shows bilateral diffuse asymmetrical airspace opacities which are more confluent in the right lung. There is a moderate in size right pleural effusion. Coronal CT with contrast of the chest (below) also shows right lower lobe atelectasis caused by the pleural effusion.

The diagnosis was pulmonary hemorrhage.