I've never had cancer...but if I did I would use the Gerson therapy in conjunction with I.V. oxygen therapy as well as many other beneficial nutritional suppliments and sodium bicarbonate. I.V vitamin c may be another obvious option. Cancer can be a very complicated disease and attacking it from many different levels would probably be the best way to conquer it.
Using the Gerson therapy can only help. juicing organic fruits and eating a healthly, clean diet is what people should be doing in the first place.