The arteries of the brain sometimes develop tiny bulges, called cerebral aneurysms. Most of the time, these bulges are harmless. Only when a bulge breaks are there severe problems. The ruptured aneurysm floods the brain with blood and deprives the brain tissue normally served by that artery of nourishment. This type of stroke can be debilitating or even deadly.
The research discovered that the tissues that make up cerebral aneurysms are constantly changing and reforming. As published in the journal Stroke, they found that the collagen that forms these arterial bulges is much younger in people prone to ruptured aneurysms than collagen in people with no risk factors.
This discovery is not ready to deploy into hospitals and doctors' offices. More research is needed, but this does offer a bit of hope for the two or three percent of us who are walking around with a potential life-threatening cerebral aneurysm hiding in wait.