Fig. 3

Double aortic arch with an atretic left arch. a and b Axial CT scan images show bilateral aortic arches. The right aortic arch is dominant (arrow). The left aortic arch is atretic (arrowhead). c 3D volume-rendered image demonstrates the double aortic arch. The dominant right aortic arch (arrow) gives off the right subclavian and right common carotid branches, while the left atretic aortic arch gives off the left common carotid and left subclavian arteries proximal to the atretic region (arrowhead). Only the right aortic arch joins the descending aorta (*). d Virtual bronchoscopy demonstrates severe narrowing of the airway by the double aortic arch with atretic left arch