A blood test is one of the least invasive ways for doctors to get a peek inside the body. But when it comes to cancer, blood isn’t exactly a reliable source of information. While tumors do shed fragments into the blood, they’re rare and hard to find, so until now, the best way for doctors to learn about tumors is to physically go in and extract snippets of them with a biopsy.
But new advances in genetic sequencing is leading to more hope for a liquid biopsy for cancer, a way to track cancer through the blood.
