<prompt> Which one of the following is the most common site of Berry aneurysmVeebro-basilar aeryOrigin of posterior communicating aeryAnterior communication aeryAnterior choroidal aery  <response>: Location of cerebral aneurysms:Saccular aneurysms, AKA berry aneurysms are usually located on major named cerebral aeries atthe apex of branch points which is the site of maximum hemodynamic stress in a vessel. Moreperipheral aneurysms do occur, but tend to be associated with infection mycotic aneurysms ortrauma. Fusiform aneurysms are more common in the veebrobasilar system. Dissect ing aneurysmsshould be categorized with aerial dissect ion p.1323.Saccular aneurysms location:1. 85-95 in carotid system, with the following 3 most common locations:a ACoA single most common: 30 ACoA ACA more common in malesb p-comm: 25c middle cerebral aery MCA: 202. 5-15 in posterior circulation veebro-basilara ? 10 on basilar aery: basilar bifurcation, AKA basilar tip, is the most common, followed byBA-SCA, BA-VA junction, AICAb ? 5 on veebral aery: VA-PICA junction is the most common3. 20-30 of aneurysm patients have multiple aneurysms p.1226 Ref; Greenberg handbook of neurosurgery, 8th ed, p-1191 