I'm sorry to hear you have cancer. I would find a doctor familiar with fasting to help you through it since you have something that serious. I have heard the True North Health Center is a good place to do supervised fasting if you can afford it. http://www.healthpromoting.com/
I don't know for sure if fasting will get rid of serious cancer but it can't hurt and would be interesting to know if it does.
I am always worried I have cancer because I have drinken diet sodas like water for over 10 years. I am fasting too, but don't know how long.
good luck with it and if you do fast and it helps let us know.