CTICasesInterrupted Aortic Arch, Type B Variant with Aberrant Subclavian Arteries
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Imaging findings
Very hypoplastic ascending aorta giving rise to the two common carotid arteries. There is an interruption of the aortic arch after the carotid arteries. The left subclavian artery originates from the descending thoracic aorta, classifying it as a Type B interruption. Additionally, both subclavian arteries arise from the descending thoracic aorta. A large patent ductus arteriosus (PDA) is present, resembling a transverse aorta.
Key takeaways
This case presents a rare variant of Type B interrupted aortic arch where both subclavian arteries originate from the descending thoracic aorta. This unique anatomical configuration, coupled with a severely hypoplastic ascending aorta, underscores the wide spectrum of congenital aortic arch anomalies.
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