Aberrant right subclavian artery

Case contributed by Dr Bruno Di Muzio


CTA requested for carotid stenosis evaluation previously spotted on Doppler study.

Patient Data

Age: 80 years
Gender: Female

CTA Neck

The right subclavian artery is the fourth and last aortic arch's branch and hooks back to reach the right side, passing posterior to the oesophagus. 

Case Discussion

Instead of being the first branch (with the right common carotid as the brachiocephalic artery), aberrant right subclavian artery (ARSA) arises on its own as the fourth branch, after the left subclavian artery. It then hooks back to reach the right side. Aberrant right subclavian arteries relationship to the oesophagus is variable:

  • 80 % posterior to oesophagus
  • 15 % between oesophagus and trachea
  • 5 % anterior to the trachea
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Case information

rID: 19283
Published: 23rd Aug 2012
Last edited: 16th Jul 2018
System: Chest, Vascular
Inclusion in quiz mode: Included

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