The embryological basis of the retroesophageal<unk>  right<unk>  artery In the normal embryological development of the aortic arches, the right dorsal aorta regresses caudal to the origin of the 7th intersegmental artery which gives rise to the right<unk>  artery. In formation of an<unk>  right<unk>  artery, the regression occurs instead between the 7th intersegmental artery and the right common carotid so that the right<unk>  artery is then connected to the left dorsal aorta via the part of the right dorsal aorta which normally regresses. During growth, the origin of the right<unk>  artery migrates until it is just distal to that of the left<unk> .
Aberrant subclavian artery
Persistent left superior vena cava
Persistent thyroglossal duct
Interrupted aortic arch
Right-sided aortic arch
Pulmonary artery sling
Tracheal agenesis
Double aortic arch