When it comes to hereditary breast or ovarian cancer (HBOC), the best defense is a good offense. In other words, be proactive! If you or one of your blood relatives (parent, sibling, grandparent, etc.) has been diagnosed with HBOC, you may be at an increased risk of developing one of several types of cancer. It is up to you to manage your health from the outset—and to take steps needed to identify if you have HBOC and prevent cancer or catch it early when it is most treatable.