It's said that the button mushrooms can protect you from prostate cancer. At the same time some studies show that it causes cancer in mice.
But the reality is that no single food can prevent you from cancer. Also no single food will cause cancer either. But a diet containing a mixture can possibly reduce the cancer risk.
Once metastasis occurs the outlook isn't that good. Here's a recent study by the Danish Health...
17,251 patients with bone metastasis. The most common primary cancer types with bone metastasis were prostate (34%), breast (22%) and lung (20%).
Survival: Survival after diagnosis of bone metastasis (all) varied widely by cancer type. One-year survival after bone metastasis was lowest in patients with lung cancer (10%, 95% CI 9% to 11%) and highest in patients with breast cancer (51%, 95%CI 50% to 53%). Three-year survival ranged from 2% for lung cancer (95%CI 1 to 2), 12% (96%CI 11% to 13%) for prostate to 25% (95% CI 23% to 26%) for breast cancer. At 5 years of follow-up, only patients with breast cancer among the solid tumours had over 10% survival (13%, 95%CI 11% to 14%).
Conclusions: While patients with bone metastases after most primary cancers have poor survival, one of ten patients with bone metastasis from breast cancer survived 5 years.