TV3's 60 Minutes aired a program called Living Proof. A King Country farmer defied death because his family insisted on administering intravenous Vitamin C. The medical fraternity refused saying "he's going to die, it won't work".
The family insisted on the treatment and reluctantly the doctors agreed to administer the treatment. As a result, the man survived. The doctors put his miraculous recovery down to the fact that they had turned the man on his stomach and refuse to admit that the Vitamin C had cured him. However, there is no proof that lying on one's stomach cures cancer.
You can watch the program on TV on demand at:
http://onemand.tv3.co.nz/living-proof/tabiod/59/articleID/923/MCat/22/Default.aspx