Right-side aortic arch with aberrant left subclavian artery and Kommerell's diverticulum. A cause of vascular ring

The right-side aortic arch may be associated with aberrant left subclavian artery, in some cases this artery originates from an aneurismal dilation of the aorta called Kommerell's diverticulum. A report is presented on 2 cases of vascular ring formed by a right-side aortic arch, anomalous left subclavian artery, Kommerell's diverticulum and left patent ductus arteriosus. A review the literature was also performed as regards the embryological development and the imaging methods used to help in the diagnosis of this rare vascular anomaly.