School ager with heart murmur

CXR and CT of mediastinal teratoma
CXR AP and lateral (above) shows a large anterior mediastinal mass causing tracheal deviation to the right. Axial CT without contrast of the chest (below left) shows the mass to be low density and to contain calcium. Axial CT with contrast of the chest (below right) shows the mass to have rim enhancement and to be primarily fluid-filled.

The diagnosis was mediastinal teratoma.