[Fenestration of the extracranial tract of the vertebral artery: angiographic demonstration of 3 cases].

The authors describe 3 cases of the extracranial Vertebral artery fenestration. This anomaly is a rare case seen in autopsy and angiographically, and in literature too the cases described are few and prevalently by Japanese authors. This anomaly is important because frequently is associated with others congenital intra and extracranial vascular abnormalities.