Article Text

Download PDFPDF
Rare anatomical variations of persistent trigeminal artery in two patients with non-aneurysmal subarachnoid hemorrhage
  1. Edgar A Samaniego1,
  2. Guilherme Dabus1,
  3. Vincenzo Andreone2,
  4. Italo Linfante1
  1. 1Baptist Cardiac and Vascular Institute, Miami, Florida, USA
  2. 2Department of Neuroscience, Ospedale ‘Antonio Cardarelli’, Naples, Italy
  1. Correspondence to Dr E A Samaniego, Baptist Cardiac and Vascular Institute, 8900 N Kendall Drive, Miami 33176, Florida; edgarsama{at}


Carotid–basilar anastomoses are remnants of the fetal circulation and although rare, they may become symptomatic and should be recognized during cerebral angiography. Two patients are described with non-aneurysmal subarachnoid hemorrhage and persistent trigeminal arteries (PTA) found on cerebral angiography. In the first patient, the PTA ended in the anterior inferior cerebellar artery (AICA) and posterior inferior cerebellar artery. The second patient had a PTA terminating in the AICA and superior cerebellar artery. These rare anatomical PTA variants should be recognized on cerebral angiography.

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.


  • Competing interests None.

  • Patient consent Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.