Cerebral aneurysms are pouch-like focal dilatations of intracranial arteries, which usually occurred at their branching points. Most of these aneurysms remain asymptomatic and never ruptures. When an aneurysm ruptures, it may bleed into the brain parenchyma resulting in a parenchymal hemorrhage, or more often, it will bleed into the subarachnoid space, resulting in a subarachnoid hemorrhage (SAH). Cerebral aneurysms are not a disease unique to the modern society and a lot of improvements have been achieved especially in its treatment in the second half of the 20th century, especially after the adoption of microsurgical techniques and FDA approval for detachable coils as Endovascular techniques to treat cerebral aneurysms in 1995.
The aim of the current study is to review basic knowledge about the cerebral aneurysms, with brief telescopic view on areas of conflicts, to know the current state of research regarding the cerebral aneurysms to conclude what the future research trends should be.