I have never had a biopsy, or been diagnosed with cancer, so what I experienced cannot prove anything.
I treated a rapidly growing, hard, dark mole, unlike any other mole I had, with a concentrate I made out of red clover blossoms. On the 4th day I could not see where to put my potion. There was no change in other moles that I used it on at the same time.
After developing a lump where we are not supposed to have them, I went on an all raw vegan diet along the lines of Gerson's diet. I did not do any of the cleansing programs etc. The only cheating on the diet was occasional sea foods. It took a long time, but eventually the lump grew rapidly for a week and then disappeared.
If I had a serious growth I would use a far more aggressive approach, more along the lines of Dr Richard Schulze's Incurables Program.
....and I would try that before seeking any other treatment.