After the implant has been in the animal for many years, sarcomas usually develop around the implant. If the implant is pulverized or its structure is markedly altered before insertion, no sarcomas develop. This shows that the physical structure causes the cancer, other than the chemical composition. Even though it is unknown why cancer happens in some people and not in others heredity seems to have an effect in some forms of cancer. Because of this, family history may be significant in predicting and diagnosing cancer.
Prevention is the best way to avoid cancer.
Since the majority of cancer is related to the environment, it would be best to identify and control these factors. There are two tests to discover carcinogens. The Ames test measures the ability of a substance to cause mutations in bacteria and is more than 90 percent effective. The alternative is animal testing. One of the most important ways to protect yourself is early detection.