Thank you for this. Would you please consider using a large pointer and the entire surface area of the slides for those of us who are losing our vision to age? Much appreciated!
It just means that instead of one artery, you have two, and then they join together a little later. Like if a river started out as two rivers and then merged into one. This is pretty common and nothing to worry about.
Very common. This reference says 75% it is asymmetric, although I'll not that it depends on how asymmetric you are talking about. It's probably truly hypoplastic less than 10%. www.sciencedirect.com/science/article/pii/S2211968X12000708#:~:text=Frequency%20of%20VAH%20(diameter%20equal,the%20vertebral%20artery%20%5B10%5D. www.ncbi.nlm.nih.gov/pmc/articles/PMC9368006/
