Screening means checking your body for cancer before you have symptoms. Getting screening tests regularly may find breast, cervical, colorectal (colon), and lung cancers early, when treatment is likely to work best., Cancer screening guidelines vary based on whether you have factors that increase your cancer risk. For example, risk factors include having a family history of cancer or a genetic mutation known to cause cancer. Your healthcare provider will consider your risk factors to determine what cancer screenings you need., , , , .