From internet you can read about a big mass of complementary therapies. We cannot explain them all and refer to the book of Hirneise who intensively checked most of them.
In all these methods the body is not damaged by poisonous substances or rays. They all use self-healing power.
We will only mention a very elegant way. It is possible to use the pungent principle of chili to open closed membranes of mitochondria (Mori et al. 2006; Meyer, Mandel, Knapp 2011)) and start apoptosis without any negative side-effects. But also in this case the tumour disappears, only.
If the reasons for cancer are not treated sooner or later a new one will appear.