I've heard of two separate cures.
Both take advantage of the differences between the mutated cell and the healthy cell.
The first one takes advantage of the fact that the mutated cell is more acidic than the healthy cell, and thus requires that it remain in a more acidic environment. The way to destroy these cells is to make the environment more alkaline. injecting baking soda into the body where the cancerous cells are located will kill the cancer cells but not the healthy cells.
The second one takes advantage of the fact that the healthy cell intakes a certain electrical frequency than the mutated cell. Basically, an electrical current is sent through the body at the frequency that the mutated cell takes it, and then the power is enhanced enough to kill the mutated cells. The healthy cells are left unharmed.
I'm not entirely sure of the validity of these two cures, but I do know that there are other cures as well that people have claimed cures cancer.