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aberrant right subclavian artery

DA:118

Monday 20 November 2006

Aberrant subclavian artery, or aberrant subclavian artery syndrome refers to a rare anatomical variant of the origin of the right (ARSA) or left (ALSA) subclavian artery. This abnormality is the most common congenital vascular anomaly of the aortic arch.

Types

- right aberrant subclavian artery (ARSA)
- left aberrant subclavian artery (ALSA)

Pathology

The aberrant right subclavian artery (ARSA) usually arises just distal to the left subclavian artery and passes posterior to the mediastinum on its way to the right upper extremity. Such course of this aberrant vessel may cause a vascular ring around a mediastinal structure.

Dysphagia due to an aberrant right subclavian artery (ARSA) is termed dysphagia lusoria. Palsy of the recurrent laryngeal nerve is termed Ortner syndrome.

The aberrant right subclavian artery (ARSA) frequently arises from a dilated segment of the proximal descending aorta, the so-called ’diverticulum of Kummerel’.

Types

- retroesophageal right subclavian artery (RERSCA)

See also

- vascular malformations

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