Truncus arteriosus and double aortic arch associated with DiGeorge syndrome.

We report the 1st known case in which truncus arteriosus and double aortic arch have been associated with DiGeorge syndrome. The association of these 2 cardiovascular anomalies lends support, by itself, to speculation that truncus arteriosus and double aortic arch have a common embryonic pathogenesis; and the presence of these anomalies in a patient with DiGeorge syndrome strengthens the contention that the common causative factor is pathologic development of the neural crest cells.