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Gastrointestinal Imaging

Vascular impression, oesophageal

impression of the oesophagus caused by congenital anomalies like vascular rings due to aortic arch anomalies. Another not infrequent cause is an anomalous right innominate artery (a. lusoria) (Fig.1). In this entity the right subclavian artery leaves the aorta to the left and distal to the left subclavian artery. It courses behind the oesophagus and to the right. Patients with this anomaly may have dysphagia but most are asymptomatic.

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Fig.1

The oesophagogram (a) shows a typical posterior impression (arrow) on the upper oesophagus due to arteria lusoria. The relation between anomalous right subclavian artery (arrowhead) and oesophagus (arrow) is better depicted on axial CT scan (b).


Vascular impression, oesophageal, Fig.1 (a)		Vascular impression, oesophageal, Fig.1 (b)