CXR AP at presentation (above left) shows mediastinal shift to the left and complete opacification of the left hemithorax due to complete atlectasis of the left lung. A subsequent CXR AP obtained the next day (not provided) showed reexpansion of the left lung which was symmetrically expanded when compared to the right lung. CXR AP obtained 3 months later (above right) showed the left hemithorax to be hyperlucent when compared to the right hemithorax. Axial CT without contrast of the lungs (below) again shows the relative hyperlunceny of the left hemithorax and a foreign body is seen just beneath the carina filling the proximal left mainstem bronchus (below center).
The diagnosis was airway foreign body in the proximal left mainstem bronchus.
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