As far as oxygen treatments go as well as the above recommended ozone (which I agree with) also consider hyperbaric treatments. The pressure will drive the oxygen even deeper. Oxygen along with getting alkaline (which really means getting mineralized) will bring your body from a cancerous state to a normal state. No need to overcomplicate with a million suppliments (which are toxic anyway).
The core diet for healing anything powerfully is... RAW VEGAN.