Treat the cancer like the fungal infection it is. Get a fungus frequency zapper olive leaf etract, and do a parasite cleanse including the Clark type zapper. Sometimes you can get one zapper that'll do both, which I believe parazapper sells one of. As long as the parasites are there, they'll keep reinfecting you with the fungus.
'Cancer' fungus isn't that hard to beat, and hardly the scary mysterious thing we've all been tricked into believing, so they can steal us blind with all the special doctors and horrid expensive drug treatments that are like burning down the house to kill a spider.
It is tougher thing to root out once it takes hold, but just be persistent. I got rid of my 'stage 3' liver tumor in a month or two--as the tumor collapsed though, some of the fungus wandered down into my hip joint, which because it was deeper and more needful of the current being aimed right, it took a couple more months, but in 4 or so months I was and still am and always will be 'cancer' fungus free.
Onions do kill fungus, but not parasites out of the digestive tract, so using it alone isn't likely to give long term success, in my opinion.