debjoe, Not to sound like everyone else, but that is such a horrible thing to have to go through, and so young.. I'm so sorry. I know it's hard enough to have one person close to you go through it, but 2... I know they say is is not a heredity thing, but I hope you and others in your family get checked out regularly. Maybe it is something in the environment.. did you guys all live close together geographically? I don't know, just a thought.
Take care,
Rachael