Vertebral artery hypoplasia and chronic migraine: is there an association or just an incidental finding?

We describe a 29-year-old woman with chronic migraine and psychiatric comorbidities that presented with new transient left-sided hemiparesis and hemi-hypoesthesia and were found to have right vertebral artery hypoplasia (VAH). We briefly review the association of VAH and migraine and the influence of psychiatric disorders and VAH as possible risk factors for chronification of episodic migraine. Despite uncertain mechanisms, VAH may be one of thecontributing factors for the chronicity of migraine.