i am sorry to hear about your son, i myself have a symptomic intracerebral aneurysm,there are really no symptoms except bad headache and neckaches. i now live with coils in my head, i was told i have a 2-4% chance of returning. i never ever thought i would have one. now every day i think about if it's going to return. i still have headaches but i have scans alot now. i am sorry for your loss.