Anterior cerebral artery – Anatomic region favoring aneurysms: Case series.

Aneurysms or Dilatations in the vessels which are prone to rupture occur at bifurcations of large arteries at the base of brain. Rupture occurs into the sub-arachonoid space in the basal cisterns and into parenchyma of the brain. 80-90% of these aneurysms occur at circle of Willis. Commonest types are the Berry’s aneurysms and commonest sites are at junction of anterior communicating artery with anterior cerebral artery and bifurcation of middle cerebral artery.