Answer:
Blood collection between middle (arachnoid) and inner (pia mater) linings of the brain. It can be a result of trauma, or a bursting (ruptured) aneurysm. An aneurysm is a small area of weakness of the wall of an artery, which may be congenital, or less commonly, due to other causes, such as an infection.
| Previous Question | Next Question |
| What is tomoTherapy? | What is active Length? |