Breakthrough in early cancer detection
A Johns Hopkins study found that a special blood test can pick up signs of cancer up to three years before it's usually diagnosed.
By analyzing blood samples from a large health study, researchers showed this early detection could help people get treated sooner and boost their chances.
How the study was conducted
Researchers compared blood from people who later got cancer to those who didn't.
Their test flagged early cancer signals in eight cases, even finding tumor DNA before symptoms showed up.
This is a big step forward for catching cancer earlier than ever.
Challenges ahead
Finding cancer this early could make treatment way more effective, but doctors are still figuring out what to do after a positive result.
Scientists now want to see if these tests actually help people live longer and how they fit with other ways of diagnosing cancer.