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Atypical case of bow hunter's syndrome linked to aberrantly coursing vertebral artery: A case report
Jun Hyong Ahn1, Hyo Sub Jun1, In Kyeong Kim1
1Department of Neurosurgery, Kangwon National University School of Medicine, Kangwon National University Hospital, Gangwon-do, Chuncheon-si 24289, South Korea.
Background:
In bow hunter's syndrome (BHS), also known as rotational vertebral artery (VA) syndrome, there is dynamic/rotational compression of the VA producing vertebrobasilar insufficiency. Most occurrences involve atlantoaxial rather than mid-cervical VA compromise, the latter being rarely reported. Herein, we detail successful VA decompression at mid-cervical spine, given a departure from its usual course.
Case Summary:
The patient, a 45-year-old man, presented to our hospital with occipital headache and vertigo. Computed tomography angiography showed anomalous C4 entry of right VA, with compression upon head rotation to that side. Thyroid cartilage and anterior tubercle of C5 transverse process were visibly at fault. We opted for surgery, using an anterior cervical approach to remove the anterior tubercle. Patient recovery was uneventful and brought resolution of all preoperative symptoms.
Conclusion:
BHS is an important consideration where aberrant coursing of VA and neurologic symptoms coexist.
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