A. While testing is the most accurate way to determine the risk of hereditary cancer, only people who have cancer in their family or a personal history of the disease need to be tested. If you have had cancer and/or cancer runs in your family, let your healthcare professional know. To help you assess whether you may benefit from hereditary cancer genetic testing, take the Myriad Hereditary Cancer Quiz. This simple, 30-second quiz can help you get the information you need to discuss your risk of cancer with your healthcare professional and ask for further evaluation.