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Fig. 7 | BMC Pregnancy and Childbirth

Fig. 7

From: Fetal double aortic arch: prenatal sonographic and postnatal computed tomography angiography features, associated abnormalities and clinical outcomes

Fig. 7

Postnatally confirmed diagnosis of DAA by multidetector-row CTA with volume-rendering processing. a Transaxial view: The ascending aorta divides into two arches surrounding the trachea and esophagus. b Left view of volume-rendered image: The spatial structure mimics that in Fig. 6, but the branches (the LCCA and the LSA originating from the left arch, the RCCA and the RSA originating from the right arch) and the arches surrounding of the trachea and esophagus appear clearer. c The proximity of the posteroinferiorly distorted left subclavian artery (arrow) and descending aortic diverticulum (*) suggests a possible fibrous connection (arrowhead) between the two structures and demonstrates a double aortic arch with an atretic left aortic arch distal to the origin of the left subclavian artery. d. A trachea compressed by the vascular ring is shown (arrowhead) (AAO: ascending aorta; R or R-ARCH: right aortic arch; L or L-ARCH: left aortic arch; RCCA: right common carotid artery; RSA: right subclavian artery; LCCA: left common carotid artery; LSA: left subclavian artery; DAO: descending aorta; T: trachea; LPB: left principal bronchus, RPB: right principal bronchus)

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