No, you can't. An at-home DNA test doesn't test whether you have cancer* - it tests your chances of getting one over your lifetime. For some people, for examp

No, you can't. An at-home DNA test doesn't test whether you have cancer* - it tests your chances of getting one over your lifetime. For some people, for example, there will be an 80% chance to get breast cancer during their lifetime, and they should start checking themselves often. * One exception is a colon cancer test - you can send (apologies) a swab of your poop to test it for mutated DNA that is present if you already have early colon cancer.