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A brain aneurysm seldom causes any noticeable symptoms until it ruptures. In some cases, however, a large aneurysm or one that is pressing against certain nerves or tissues may cause symptoms even though the aneurysm has not yet burst.
Some examples of symptoms in cases of cerebral aneurysm that has not ruptured include:
Once a cerebral aneurysm has burst, the consequences can be severe and life threatening. A ruptured cerebral aneurysm is also called subarachnoid haemorrhage and leads to severe intracranial bleeding that can cause several dangerous symptoms.
Examples of these symptoms include:
About 60% of people who suffer a subarachnoid hemorrhage die within two weeks of the event. Of those who survive, about 50% will be severely brain damaged or disabled.