Abstract
Seven cases of congenital anomalies of brachiocephalic arteries are presented; malfor mations include unilateral absence of the internal carotid artery (ICA) (n = 3), unilat eral hypoplasia of the ICA (n = 2), agenesis of the innominate artery (n = 1), and atresia of the subclavian artery (n = 1). All patients but 1 exhibited symptoms of cerebrovas cular insufficiency at the time of radiologic investigation; they were not affected by other cardiovascular malformations, except right aortic arch in 2 cases and left cervical arch in another case. Two patients suffering from congenital subclavian steal syndrome underwent surgery to correct the vascular malformations. Embryogenesis and natural history of such malformations are briefly discussed.
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