Dilated aberrant right subclavian artery (arteria lusoria), as a rare cause of dysphagia in a patient with abdominal aortic aneurysm.

A rare case of a 70 years old man with dysphagia secondary to compression of the oesophagus by dilated aberrant right subclavian artery (ARSA, Arteria lusoria) is presented. Contrast enhanced computed tomography of the mediastinum in our patient revealed this anomalous vessel arising from the aortic arch distal to the left subclavian artery which passed behind the esophagus as it traveled to the right axilla. It had proximal dilated segment compressing the esophagus. The co-existence of this anomaly with aneurysm of abdominal aorta was a unique finding in our patient. ARSA should be taken into account in patients with dysphagia when more common lesions are excluded.