May Cause

Enhancing mediastinal mass

Superior mediastinal mass

Wide superior mediastinum in an infant or child

May Be Caused by

 Common

Coarctation of aorta

Double aortic arch

Left aortic arch with aberrant right subclavian artery

Pseudocoarctation of aorta

Right anterior aortic arch

Right posterior aortic arch

 Uncommon

Anomalous innominate artery

Anomalous left common carotid artery

Aortic arch anomaly - peculiar facies - intellectual deficit

Cervical aortic arch

Innominate artery compression syndrome

Left aortic arch with right ductus and right descending aorta

Pulmonary sling

Right aortic arch with left descending aorta

Right aortic arch with right descending aorta and aberrant left subclavian artery