Medical experts do not know exactly what causes prostate cancer. The condition occurs when healthy cells develop genetic changes, or mutations, that interfere with normal functioning, but it’s unclear what causes those changes.
In some cases, you inherit genetic mutations from your parents. For example, mutations in the BRCA1 and BRCA2 genes, which are linked to breast cancer, are also linked to prostate and a few other cancers. These genetic mutations are often inherited and may account for about 10% of prostate cancers. Genetic testing can help you learn if you have these inherited gene mutations.
Your genes can also change over the course of your life. Known as acquired genetic mutations, these are the changes most linked to prostate cancer. Some research suggests that high levels of certain hormones, exposure to radiation, lifestyle choices and some cancer-causing chemicals can cause genes to mutate. However, more studies are needed to understand whether these links exist and exactly how they work.