North American Spine Society Annual Meeting
North American Spine Society Annual Meeting
December 08, 2014
1 min read

Vertebral artery anomalies can exist in patients without cervical abnormalities

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ORLANDO, Fla. — Vertebral artery and osseous anomaly at the C1-2 level were existent in patients with normal cervical spines, according to data presented at the Cervical Spine Research Society Annual Meeting, here.

Norimitsu Wakao, MD, PhD, presented results of a study which conducted cervical 3-D-CT angiography of the craniovertebral junction for 480 patients with healthy cervical spines. Patients with rheumatoid arthritis, Klippel-Feil syndrome or Down syndrome, among other cervical diseases, were excluded from the study. Overall, 387 patients were eligible for the study.

Norimitsu Wakao

Wakao said the images showed that patients with healthy cervical spines presented with several different types of vertebral artery (VA) anomalies, such as first intersegmental artery, posterior inferior cerebellar artery, high riding VA, and ponticulus posticus, among others. It had previously been reported that VA anomalies were mostly prevalent in patients with congenital or acquired disorders, Wakao said.

“The prevalence of  [first intersegmental artery] FIA, fenestration and [posterior inferior cerebellar artery] PICA, was 1.8, 1.5, and 1.5%. The prevalence of high riding VA was 10.1% and the prevalence of PP was 6.2%. VA and osseous anomalies at the craniovertebral junction exist, even in patients without any cervical abnormalities at a constant rate,” he said. — by Robert Linnehan


Wakao N. Paper #36. Presented at: Cervical Spine Research Society Annual Meeting; Dec. 4-6, 2014; Orlando, Fla.

Disclosure: Wakao has no relevant financial disclosures.