Basilar artery fenestration
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Basilar artery fenestration (or more simply, basilar fenestration) is the most common intracranial arterial fenestration. It refers to duplication of a portion of the artery. Its reported is highly variable depending on the technique used:
- ~0.5% (0.3-0.6%) at angiography (presumably low due to preferential laminar flow in only one lumen at a time)
- 2% on MRA
- up to 5
.26% at autopsy
Typically fenestration occurs at at the lower end of the basilar artery just as the vertebral arteries join. However, it can also be seen in the mid-basilar and distal tip.
Related pathology
There is an increased incidence of basilar aneurysm formation at the site of fenestration, presumably due to abnormal flow dynamics. They are reported in 7% of fenestrations.
-<li>up to 5.26% at autopsy</li>-</ul><p>Typically fenestration occurs at at the lower end of the <a href="/articles/basilar-artery">basilar artery</a> just as the <a href="/articles/vertebral-artery">vertebral arteries</a> join. However, it can also be seen in the mid-basilar and distal tip.</p><p>There is an increased incidence of <a href="/articles/basilar-aneurysm">basilar aneurysm</a> formation at the site of fenestration, presumably due to abnormal flow dynamics. They are reported in 7% of fenestrations.</p>- +<li>up to 5% at autopsy</li>
- +</ul><p>Typically fenestration occurs at at the lower end of the <a href="/articles/basilar-artery">basilar artery</a> just as the <a href="/articles/vertebral-artery">vertebral arteries</a> join. However, it can also be seen in the mid-basilar and distal tip.</p><h4>Related pathology</h4><p>There is an increased incidence of <a href="/articles/basilar-aneurysm">basilar aneurysm</a> formation at the site of fenestration, presumably due to abnormal flow dynamics. They are reported in 7% of fenestrations.</p>
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Image 5 DSA (angiography) (Right vertebral) ( create )
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