Bilateral segmental regression of the carotid and vertebral arteries with rete compensation in a Western patient

  • Mahadevan J
  • Batista L
  • Alvarez H
 et al. 
  • 13


    Mendeley users who have this article in their library.
  • 28


    Citations of this article.


We report a case of symptomatic symmetrical, bilateral absence of the cavernous internal carotid (ICA) and transdural vertebral artery (VA) segments with formation of a rete mirabile. There have been similar reports in Asian patients; ours is the first in the Western population. A 29- year-old woman presented with recurrent temporary blindness and an episode of minor subarachnoid haemorrhage. Angiography demonstrated absence of the C5 and C6 segments of the ICA and the C1/2 segments of the VA bilaterally, with typical carotid rete mirabile formation to reconstitute the distal flow. Comparative anatomy and embryology show retia in several species and point to their secondary origin. The anomalies of the ICA cannot be called agenesis but rather absence since they are likely to result from perinatal disappearance of the artery rather its failure to develop.

Author-supplied keywords

  • Arterial agenesis
  • Carotid artery
  • Rete mirabile
  • Vertebral artery

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • J. Mahadevan

  • L. Batista

  • H. Alvarez

  • E. Bravo-Castro

  • Pierre Lasjaunias

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free