William Herring, M.D. © 2003 DDiisseeaasseess ooff tthhee GGrreeaatt VVeesssseellss In Slide Show mode, to advance slides, press spacebar All illustrations retain their original copyrights Aortic Anomalies General Most are asymptomatic l Unless they cause n encircling vascular ring like pulmonary sling Can be complex l lesions requiring multiple projections MRI or CT n © Frank Netter, MD Novartis® Aberrant Subclavian Arteries General Left arch with aberrant right subclavian l Usually passes posterior to esophagus n Dilated origin is “Diverticulum of Kommerell” n Right arch with aberrant left subclavian l Most are asymptomatic n Passes behind esophagus n Low incidence of congenital heart dz n Left Aortic Arch Left Aortic Arch With Anomalous RSCA With Anomalous RSCA Left Arch with Anomalous RSCA Occurs in less than 1% of people l Passes posterior to esophagus l Pushes trachea and esophagus forward n Produces oblique shadow above l aortic arch on frontal film Origin of RSCA may be dilated l Diverticulum of Kommerell n © Frank Netter, MD Novartis® © Dahnert Lippincott Williams & Wilkins Left Aortic Arch with Aberrant R SCA Left Aortic Arch with Aberrant Right SCA © L. Elliott, MD J.B. Lippincott ® Left Aortic Arch with Aberrant R SCA Right Aortic Arches Right Aortic Arches Right Aortic Arch Types At least five different types l Only two of importance l
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