CAA is the third leading cause of stroke and is not well publicized.
CAA is defined by a type of protein deposit in the wall of blood vessels in the brain.
CAA is actually a common process in aging and usually harmless.
In some people with CAA, the protein deposits cause the blood vessel walls to crack, in which case blood can leak out and damage the brain.
The damage from this process is called a bleeding (or hemorrhagic) stroke.