Everything I read about cancer says it needs sugar (carbohydrates) to survive. I believe I'd eliminate sugar for sure from my diet and also increase eating the cruciferous vegetables (broccoli, cauliflower, cabbage, brussel sprouts, etc. Also asperagus.) I don't know if your doctor will restrict you from eating sugar or not, and he probably won't advise you to eat those vegetables either, but that's what I would do.

In case you just can't bring yourself to eat those veggies, you can take Indole-3-Carbinol which is made from the cruciferous vegetables. I do hope you can turn this around quickly.