International Scholarly Research Notices / 2014 / Article / Fig 1

Research Article

Vertebral Artery Hypoplasia in a Black Kenyan Population

Figure 1

(a)–(d) Photomicrographs showing various grades of vertebral artery hypoplasia in an adult black Kenyan population. BA: basilar artery; VA: vertebral artery; LVA: left vertebral artery; RBA: right vertebral artery.
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(a) Symmetrical vertebral arteries uniting to form basilar artery. Note the equal size of the vertebral arteries
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(b) Bilateral asymmetry with mild hypoplasia of right vertebral artery. Note the relatively smaller RVA compared to LVA
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(c) Hypoplasia of RVA. Note that calibre RVA is less than half that of LVA
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(d) Severe hypoplasia of the LVA. Note the obviously attenuated LVA relative to the normal RVA

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