Fenestration of the Vertebral Artery with a Review of 23 Cases in Japan

Published Online:https://doi.org/10.1148/103.2.343

Seven cases of angiographically demonstrated vertebral artery fenestration are presented, and 23 cases are reviewed. In the 7 cases described, fenestration occurred at the level of the atlantoaxial junction, on the left side in 5 cases, and on the right in 2. Fenestration or partial duplication of the vertebral artery is considered to be an anastomosis anomaly occurring during embrologic development. This anomaly is frequently associated with other congenital intracranial and extracranial vascular abnormalities including aneurysms and arteriovenous malformations.

Article History

Accepted: Nov 1971
Published in print: May 1972