There may be very little you can do to avoid primary ]]>brain tumors]]>. You can do nothing about your heredity, which is one of the few known risk factors. Avoiding radiation and toxins is desirable, unless the ]]>radiation]]> is used to treat a cancer. While it is difficult to reduce your risk of primary brain tumors, you can reduce your risk of tumors that may spread to the brain, including ]]>lung]]> , ]]>breast]]> , ]]>melanomas]]> , and ]]>prostate.]]>