I think it's more along the lines of "stress isn't proven to cause cancer, but if you have cancer then it may cause it to regress". Also, given that stress sig

I think it's more along the lines of "stress isn't proven to cause cancer, but if you have cancer then it may cause it to regress". Also, given that stress significant suppresses the immune system, and that the immune system is important for protecting against cancer growth, I think it is highly unlikely that stress wouldn't affect cancer. https://en.wikipedia.org/wiki/Cancer_immunology https://en.wikipedia.org/wiki/Cancer_immunology