A Rare Artery Discovery: Two Right PCA Branches

Have you ever wondered how unique our bodies can be? A recent case study found something extraordinary in a 34-year-old woman's brain. Usually, the posterior cerebral artery (PCA) has a pretty standard path. But not in this case! The right side of her brain had not one, but two PCAs. One was typical, coming from the basilar artery. The other was a surprise, originating from the right internal carotid artery (ICA). This is what doctors call a "complete duplication" of the PCA, and it's super rare, happening in only 0.04% of people. On the left side, her PCA was also a bit unusual, with a smaller-than-normal first segment (P1), which is a common variant known as the "partial fetal-type PCA. " The rest of her brain's arterial circle was normal. This discovery shows how varied our bodies can be, even in tiny details like blood vessel paths.