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.
(a) Symmetrical vertebral arteries uniting to form basilar artery. Note the equal size of the vertebral arteries
(b) Bilateral asymmetry with mild hypoplasia of right vertebral artery. Note the relatively smaller RVA compared to LVA
(c) Hypoplasia of RVA. Note that calibre RVA is less than half that of LVA
(d) Severe hypoplasia of the LVA. Note the obviously attenuated LVA relative to the normal RVA

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