Sadly enough, I knew a bit about GBM before my sister was diagnosed with it. A close family friend had a first cousin with GBM and her two brothers did as well..Joey was dx at the age of 27, Janet at 34 and Jesse at 46....They grew up on a farm in New Hampshire and we always wondered if it might be chemicals that had contaminated the drinking water...A tragedy for sure...It was devastating loosing my sister to it , I can`t imagine the pain of loosing three siblings ;-(
Hope this helped...Adonna sister of Marilyn dx GBM 7/27/09 died 12/21/09