MILFORD - News 12 Connecticut is taking an in-depth look into the causes of brain aneurysms.

A brain aneurysm is a ballooning in a blood vessel in the brain. Doctors say most people survive aneurysms either unscathed or with disability, but that one-third of victims die immediately. In addition, experts say people tend to suffer from the condition in their 40s, 50s and 60s; not at age 10, which is what happened to a Bridgeport girl last week.

Dee Dee Rosa, a fourth-grader at Luis Munoz Marin School, complained to a teacher on Tuesday that she had a headache. She died the next day at the hospital due to complications from a brain aneurysm.

Doctors say high blood pressure and family history can be risk factors, but that an excruciating headache is the ultimate indicator.

Physicians add that anyone who thinks they may be experiencing an aneurysm should quickly get to an emergency room.