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Case 49 - Right aortic arch

Published online by Cambridge University Press:  07 October 2011

By
Patrick Eiken
Edited by
Thomas Hartman
Thomas Hartman
Affiliation:
Mayo Clinic, Rochester
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Summary

Imaging description

In right aortic arch (RAA), the normal, left-sided aortic arch is absent. Instead, the aortic arch lies to the right of the trachea and esophagus. This anomaly has two major variants: RAA with aberrant left subclavian artery and RAA with mirror image branching. In RAA with aberrant left subclavian artery the branching pattern of the arch vessels is left common carotid, right common carotid, and right subclavian artery. The aberrant left subclavian artery arises distally from the proximal descending aorta and passes posterior to the trachea and esophagus (Figures 49.1 and 49.2). In RAA with mirror image branching the branching order is left innominate artery, right common carotid, and right subclavian artery (Figures 49.3 and 49.4) [1–3].

Type
Chapter
Information
Pearls and Pitfalls in Thoracic Imaging
Variants and Other Difficult Diagnoses
 , pp. 128 - 131
Publisher: Cambridge University Press
Print publication year: 2011

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References

Jaffe, RBRadiographic manifestations of congenital anomalies of the aortic archRadiol Clin North Am 1991 29 319Google ScholarPubMed
Markle, BMCross, RRCross-sectional imaging in congenital anomalies of the heart and great vessels: magnetic resonance imaging and computed tomographySemin Roentgenol 2004 39 234CrossRefGoogle ScholarPubMed
Türkvatan, ABüyükbayraktar, FGOlçer, TCumhur, TCongenital anomalies of the aortic arch: evaluation with use of multidetector computed tomographyKorean J Radiol 2009 10 176CrossRefGoogle ScholarPubMed

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