Figure 4. A 6-month girl with ventricular septal defect was detected by both CT and FTB with the left main bronchus compression and the local lumen became stenotic.

A. CT axial image demonstrated the left main bronchus stenosis due to surrounded compression by anonymous soft tissue (black arrow).

B. Volume Rendering (VR) of the tracheobronchial tree showed the local stenosis (white arrow) at the left main bronchus.

C. FTB confirmed the left main bronchus stenosis, which noted extralumen pulsatile compression of the bronchus.