In the United States, this cancer is about twice as common among black men as among white men. The incidence of this disease varies around the world, being high in North America and European countries, intermediate in South America, and low in Asia. This suggests that environmental or dietary differences may be important in prostate cancer growth. If a man immigrates to a country with greater incidence, his personal risk can increase. Men with relatives affected by prostate cancer have a greater probability of developing it.
Some risk factors are age, race, nationality, family history, diet, and physical inactivity.
Men who have a diet rich in fat and who are sedentary increase their chances of developing the cancer. Although scientists still do not know exactly what causes prostate cancer, they believe that genetic and hormonal factors may be involved. Some experts also claim that certain herbs and minerals may help. The American Cancer Society and the American Urological Association believe that prostate cancer screening can save lives. Treatment is most likely to be successful when the cancer is detected early.