CAM is for health preserving. but when comes to cancer, even tcm use poison to fight poison.

han dynasty 2000 years ago ppl use arsenic with mixture of other stuff to treat cancer.

this specific way of treating cancer is now use to treat specific leukemia, even published and use in US.

actually some chemo also uses herbs/plants

"However, some plant extracts have been found to have anti-cancer effects and have been turned into chemotherapy drugs. These include vincristine from the periwinkle plant, and taxanes from the bark of the Pacific yew tree"