http://www.reuters.com/article/healthNews/idUSTON30402020071023

emotional well-being doesn't affect cancer outcome
In a selfhelp group I encountered a woman who considerably changed her mental attitude and parts of her life (healthy food, etc) and recovered from cancer. There is a buddhist booklet available. Inside a story of a woman who retreated to a meditation monastery having cancer. After meditating for years the cancer was gone. The woman is living in Yangon if not died now as the story is some years old.
That does not mean meditation heals cancer as there are also reports of people dying of cancer in a buddhist monastery. But if cancer is at least also mind related it is possible.

You should not take western science always that serious, isn't it.