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A 24-year-old man presented to our hospital with exertional dyspnoea and non-productive cough for many years. A plain chest roentgenogram showed widening of the upper mediastinum with external compression of the trachea (figure 1A), and the lateral view suggested the presence of an isodensity double contour at the aortic arch (figure 1B). A CT angiography revealed a narrow-necked double aortic arch (DAA) with partial encirclement of the trachea (figure 2 …
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; not externally peer reviewed.