CXR at birth (above left) shows an ill-defined large mass in the lower left chest obscuring the heart border and causing mediastinal shift to the right. Axial CT without contrast of the chest at birth (above right) shows the left chest mass to contain multiple cysts that are filled with air and fluid. CXR at 10 months (below left) shows the large lower left chest mass to now be hyperlucent. Axial CT without contrast of the chest at 10 months (below right) shows the left chest mass to contain multiple large air-filled cysts.
Pediatric Imaging 