Once you have a biopsy or Surgery You have to be prepared to go through chemo or radiation. Even a cancer that is not actively growing once punctured with a biopsy needle will start actively growing and spreading. The contents of the cancer cells are released all kind of viruses. So once you have aprocedure like this you will have to act quickly to contain the situation.
As far as Dr Sultlz's incurables program. I don't think he has a good track record for this type of problem. Dr Gersom did better work. juicing alone did not work as well until he used colonics to clear out the toxins as fast as they were being released. Excersize is also important.
Yes the chemo will nock down the immune system. But the immune cells are also regenerated faster than other cells in the body. I also know some people who made it through chemo(through a friend).