Research has shown several cannabinoids kill cancer cells including CBD, THC, CBG. The acidic cannabinoids such as THCA are also involved in killing cancer cancer cells. CBDA has been shown to be very effective in battling certain kinds of breast cancer. Go to The National Cancer Institutes web site for more info https://www.cancer.gov and look up anti tumor effects of cannabis.
You will probably a high doses of an extract of both neutral & acidic cannabinoids ( start low go slow ). Beware of anything called RSO or lists Indica or Sativa as ingredients. Those terms tell you this is probably not based on science. Do not use THC by itself. Inform your oncologist of what you are using