Fact-sheet: Normal variant - Skull, spine, and central nervous system
Updated on 09/17/2021 at 12:16 PM
Note : 0/10
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Definition
Carotid-basilar anastomoses:
Rare variant of the circle of Willis
Correspond to transient anastomoses during fetal life that may persist into adulthood (0.1-0.2% of cases)
Three types: proatlantal artery, hypoglossal artery, and trigeminal artery (the most common)
More frequent association with other arterial anomalies (aneurysms)
