I don't believe diet is the only cause for cancer. My wife got cancer the second time even though we were on a good diet. There are other sources of toxins like environment in the house and outside the house.
I'm not sure of the cause for fatty liver, but I think parasites and eating fatty things might be the cause for that.
I don't think DNA causes disease. DNA is like a blue print I think. A blue print for a huse will not build a house, it takes action of some kind to get the result.
I'm sorry to hear about your cancer & doing chemo. I think the best thing to do with chemo, is ozone. That is what saved my wifes life when she was doing chemo. It was killing her too. The ozone finished off the cancer and brought back her health. Ozone enhances the kill effect of chemo. Please either get a ozone generator and keep doing the chemo, or better yet stop the chemo and just do the ozone. You can get a cheap one for $200-$300. I would bet the ozone will clean up the damage done by the chemo, and finish killing off the cancer.
Take Care, and hang in there Firework!