Antenatal diagnosis of double aortic arch

Congenital anomalies of the aortic arch affect 1-2% of the population and comprise a wide variety of abnormalities in the position and/or branching pattern of the aortic arch. Double aortic arch (DAA) represents 1-2% of all aortic arch anomalies and is characterized by persistence of both left and right embryonic aortic arches. It can be found either in isolation or, less frequently, in association with other cardiovascular or chromosomal abnormalities. Antenatal diagnosis of DAA may be challenging, as its distinction from other arch abnormalities like right aortic arch with left arterial duct or with an aberrant left subclavian artery is not always straightforward. The authors describe a case of antenatal diagnosis of DAA. (author)