What is the master point for cancer cure?
Obviously there isn’t one point to help heal something as serious as cancer… Please do not think that acupuncture works like that. You should read “What Does Acupuncture Treat?” for more information on how acupuncture approaches conditions and formulates treatments.
Treatment would depend on the type of cancer, the patients health history, what western treatments, if any, they are doing, their overall level of health, their diet, and multiple other factors. For laypeople tong ren therapy is a better approach that is easier to administer without extensive training in Chinese Medicine (acupuncture and herbal medicine). Read a general introduction and tong ren for cancer for more details.