I've had cancer three years ago. Grade 111C. (Endometrium with papillary serous and clear cells). I had a massive operation to remove it all, followed by months of heavy doses of chemo then months of daily radio therapy. I followed the instructions of a nutritionist and an Ayurveda doctor (for emotional needs), as well as my surgeon, oncologist and radiotherapist. I did everything that I was told to do, by all the different specialists. ( I wrote a Hub about it), and got better.
When we get cancer we have to learn how to deal with it and this requires following our wisest selves, as well as finding the right doctors and following their instructions, as well as learning how to accept the 'illness' path.
A balanced diet, three times a day, is essential because it gives us the strength to finish the treatments plus we have to restore all our organs and keep them well for when we recover from the treatments. (Very hard to do but not impossible!).