What is the most common location of a cerebral aneurysm resulting in subarachnoid hemorrhage?

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A subarachnoid hemorrhage means that there is bleeding in the space that surrounds the brain. Most often, it occurs when a weak area in a blood vessel (aneurysm) on the surface of the brain bursts and leaks. The blood then builds up around the brain and inside the skull increasing pressure on the brain.

Where is a subarachnoid hemorrhage located?

Subarachnoid hemorrhage is bleeding in the area between the brain and the thin tissues that cover the brain. This area is called the subarachnoid space. Subarachnoid bleeding is an emergency and prompt medical attention is needed.

What is the most common cause of subarachnoid hemorrhage is?

A subarachnoid haemorrhage is most often caused by a burst blood vessel in the brain (a ruptured brain aneurysm).