Congenital Aplasia of the Common Carotid Artery: A Comprehensive Review

Figure 2

Modified schemes [10] of the separated origin of the right external carotid (ECA) and internal carotid (ICA) arteries from the brachiocephalic trunk (BT) and right subclavian artery (SA) in the first scheme (a), and from the BT in the second scheme (b). I–VI, the first four (from six) primitive aortic arches; DC, ductus caroticus; NAA, normal aortic arch; CCA, common carotid artery; BT, brachiocephalic trunk; PT, pulmonary trunk; SA, subclavian artery.

(a)

(b)