In my view, we are the ones manifesting our personal experience of reality - to include what's going on with the body. By Nature, it is wise & well able to regulate itself. We're only now learning how harmful medical science can be, with its manipulative greed at work behind the scenes.
Our digestive system works via certain bacteria that "attack" & decompose the foodstuffs we consume. Our immune system works by killing off that which it perceives to be harmful. These work just fine when honored & supported by reasonable things like good dietary habits, exercise, etc.
Everything is always communicating with everything else. Love is the common denominator of it all, yet not any human concept of romantic love, but a Love so divine it take our breath away on direct encounter. (I guess we've so distanced outselves (LOL, I'll leave the "misspelling") from it that it's a shock on our first encounter.)
What came before the cancer cells was a long line of indications the person ignored, didn't see. When we respond to the feather-light touch, that's all that's needed. Life is always trying to come into the best possible state. It's what Love is, what it does.
He is tentatively expanding out into What Is, to expand his boundaries, but I doubt he ever considered that ALL of Life, all planets, suns, galaxies, universes, etc., are also alive, aware, & sentient - as the One.
~♥~