A basilar artery fenestration (or 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:
- 0.3 - 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
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.
This article is in need of some more references!
You can make a difference to Radiopaedia.org by adding some relevant ones.
- 1. Tasker AD, Byrne JV. Basilar artery fenestration in association with aneurysms of the posterior cerebral circulation. Neuroradiology. 1997; 39(3): 185-9. doi:10.1007/s002340050389 [pubmed citation]
- 2. Bharatha A, Aviv RI, White J, Fox AJ, Symons SP. Intracranial arterial fenestrations: frequency on CT angiography and association with other vascular lesions. Surg Radiol Anat. 2008; 30(5): 397-401. doi:10.1007/s00276-008-0340-7 [pubmed citation]
Synonyms & Alternative Spellings
|Synonyms or Alternative Spelling||Include in Listings?|
|Fenestration of the basilar artery||✗|