This 3 years old boy came with sudden breathlessness. A simulated radiograph from the CT scan images shows increased lucency of the left upper and mid-zones, which on the axial CT scan is seen a left upper lobe overinflation due to a high-grade stenosis of the left upper lobe bronchus (arrow). The minIP image shows this well (arrow). The operated overinflated lung is seen in the last panel.
Congenital Lobar Emphysema (CLE)