Figure 1: CTA images in a 6-year-old child with cyanosis. Axial images showing a) Perimembranous VSD (asterik), b)Pulmonary atresia (arrow) with confluent pulmonary arteries(c) . The right sided aortic arch (asterik) was dilated, causing side-to-side flattening of the trachea (arrows in d ).e) Coronal maximum intensity projection image showing the extrinsic compression of bronchus intermedius between the right descending pulmonary artery (white asterik) and aneurysmal MAPCA (black asterik). Azygous fissure was present (white arrows). f)Oblique coronal maximum intensity projection image showing the extrinsic compression of bronchus intermedius by the right descending pulmonary artery (white asterik) and aneurysmal MAPCA (black asterik) arising from the descending thoracic aorta (DTA).