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Abstract
Aortic arch anomalies occur early in the course of embryonic morphogenesis. It forms 0.5 to 3 % of all congenital anomalies. Six pairs of pharyngeal arch arteries develop forming the aortic arch and its branches. A variety of aortic arch anomalies result from the abnormal or incomplete regression or persistence of one of these embryonic arteries affecting the number or the position of the aortic arch and its branches.
Aortic arch anomalies can be classified, according to morphological or clinical bases, into anomalies causing vascular rings, shunts or arterial obstruction.
Physiologic abnormalities resulting from aortic arch anomalies include tracheobronchial compression, esophageal compression, and abnormal blood flow patterns.