A weakening in the wall of a brain artery which requires immediate attention due to risk of rupture
Common signs of a ruptured aneurysm include: Sudden, extremely severe, headache, nausea and vomiting, stiff neck. Patients may also have blurred or double vision, sensitivity to light, seizure, a drooping eyelid, and loss of consciousness.
Arteriovascular Malformation (AVM)
A tangle of abnormal and poorly formed blood vessels
A brain arteriovenous malformation may not cause any signs or symptoms until the AVM ruptures, resulting in bleeding in the brain or hemorrhage. In about half of all brain AVMs, hemorrhage is the first sign. Others include seizures, headache or pain in one area of the head, muscle weakness or numbness in one part of the body. Some more severe cases may also show, paralysis, difficulty speaking, confusion and severe problems with balance.