CTICasesPersistent fifth aortic arch (double-barrel aorta)
Imaging findings
CT angiogram shows a double-barrel aorta (persistent fifth aortic arch) in a child with Tetralogy of Fallot.
Key takeaways
Persistent fifth aortic arch is an extremely rare congenital anomaly where a secondary systemic arch communicates between the ascending and descending aorta, creating a double-lumen or double-barrel appearance.
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