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Double aortic arch is a rare congenital anomaly. It is usually diagnosed and surgically corrected at an early age due to symptoms as dyspnea and dysphagia caused by an obstruction of trachea and/or esophagus in the vascular ring. We present the case of an asymptomatic 14-year-old patient with complete double aortic arch as demonstrated by CMR. Blood flow in the right and left aortic arch was visualized and quantified by 4D-flow MRI.