Saccular aneurysm location

Saccular aneurysms location:

85–95% in carotid system, with the following 3 most common locations:

a) ACoA(single most-common):30%(ACoA&ACA more common in males)

b) p-comm:25%

c) middle cerebral artery (MCA): 20%

5–15% in posterior circulation (vertebro-basilar) a) ≈10%onbasilarartery: basilar bifurcation,AKA basilar tip,is the most common,followed by BA-SCA, BA-VA junction, AICA

b) ≈5% on vertebral artery:VA-PICA junction is the most common 20–30% of aneurysm patients have multiple aneurysms