If Rush does not make it, we will indeed be losing a national treasure. That said, I just can't for the life of me, see how his disease progressed so far. I mean I'm just a regular guy, but I am religious about getting my annual flight physical (classIII) plus bloodwork three times per year, Cancer can be detected by just bloodwork in many case (CA-125). Anyway, I dearly hope he can beat this, but Stage Four (and doctors correct me if I'm wrong) means it has spread to other places in the body.