To go back slightly off topic, I have a personal anecdote I'd like to share:
Less than a year ago, my grandmother was diagnosed with stage 4 lung cancer. She decided against treatment and actually refused to acknowledge the cancer - she simply didn't believe she had it. A few months later the cancer had spread to her adrenal glands and she wasn't expected to live any more than a few months. Those months passed relatively pain free and last week she went in for some imaging to see how the cancer was spreading. But nothing showed up. So, they waited a couple of days and ran the test again. Same result, no cancer was showing up. This week, they did another round of tests to confirm the results and they found no trace of cancer in either her lungs or her adrenal glands. Amazingly, it is just gone.
No treatment, no medicine, no herbs, nothing.