New blood test can detect cancer 3 years before you start showing symptoms By . McKenzie Beard. Published June 17, 2025, 12:48 p.m. ET. Want to B-positive about your health?

A routine blood test may be able to detect cancer more than three years before diagnosis, a new study suggests. In the study, published May 22 in Cancer Discovery, researchers at Johns Hopkins ...

Diagnosing Cancer Earlier Than Ever. The tests didn't stop there. After getting ahold of older blood samples – between 3.1 and 3.5 years – for 6 of the 8 positive participants, researchers ...

Johns Hopkins researchers found that tumor-derived mutations can be detected in blood up to three years before cancer diagnosis, offering the potential for earlier intervention.