Bow Hunter's Syndrome.

Bow hunter's syndrome is due to vertebrobasilar insufficiency caused by rotational compression of the vertebral artery. We report a case in which an osteophyte compressed the left vertebral artery causing cerebellar stroke. The patient underwent successful resection of the osteophyte via anterior surgical approach, and his symptoms of headache and dizziness dissipated postoperatively. This unique syndrome has been treated with multiple modalities and must remain in the clinician's differential as a treatable cause of stroke.