I have a happy thread in the gaming section, if it makes you feel any better? ;(
My dad doesn't know anything about anything, but he says that the cancer seems to be genetic. My grandfather had it, my father has it in the exact same spot (but got it treated) and now I have it. He says, though, that it gets stronger each generation.
That sounds a little weird to me, but for all I know, it could be true.