What does SAH mean?

Subarachnoid Hemorrhage (SAH) is a medical condition characterized by bleeding into the subarachnoid space, which is the area between the brain and the thin membrane that covers it called the arachnoid mater.
SAH is a type of stroke that involves bleeding into the space surrounding the brain.

Note:
The term arachnoid is derived from the Greek word arachne, which means spider.
The arachnoid mater is named as such because of its resemblance to a spider's web.

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