This is not just about cancers that affect the blood. From the article: By sequencing the abnormal DNA that a tumor releases into a person’s bloodstrea

This is not just about cancers that affect the blood. From the article: By sequencing the abnormal DNA that a tumor releases into a person’s bloodstream, researchers are now one step closer to a universal cancer test. Although the technique is now only sensitive enough to detect advanced cancers, that may be a matter of money: As sequencing costs decrease, the developers of the method say, the test could eventually pick up early tumors as well.