Teenager who was hit by a car while riding his go cart

CXR and CT of chylous pericardial effusion
CXR AP (above) shows the heart to be enlarged and to have a water bottle shape. Axial CT with contrast of the chest (below) shows a large amount of high density fluid in the pericardial space.

The diagnosis was chylous pericardial effusion due to rupture of the thoracic duct.