ABSTRACT

Vertebral artery variations are rare developmental anomalies. Although these variations are generally asymptomatic; it can predispose such pathologies as dissection, intracranial aneurysm. Additionally, these variations can effect on the treatment plan and endovascular / surgical approach.In our case, bilateral vertebral artery variations accompanying the abberant right subclavian artery were presented and abnormal origin and high foraminal entry variation were observed in the right vertebral artery. On the basis of this variation, symptomatic dissection was observed at the level of the foraminal segment of the right vertebral artery. A metallic stent was placed by endovascular approach, however the stent was compressed in follow-up period.Abnormal vascular origin, branching and running variations in functional vascular anatomy significantly affects the incidence of disease and treatment success.