Retroesophageal aortic arch — a ‘Forme Fruste’ of interrupted aortic arch

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Fig. 1. (a) Antero-superior view and (b) postero-superior view. CTangiography with 3D reconstruction showing a right aortic arch giving origin to the RCA, the LCA and the RSA. From the RSA, a relatively small but patent aortic segment (REAS) passed leftward and posterior to both the trachea and esophagus to join the proximal descending aorta fromwhich the LSA arose. On the left side of the trachea, the large PDA connects to the DA. DA: descending aorta, LPA: left pulmonary artery, LSA: left subclavian artery, MPA: main pulmonary artery, PDA: patent ductus arteriosus, RCA: right carotid artery, REAS; retroesophageal aortic segment, RSA: right subclavian artery.