DNA tags enable blood-based tests to assess cancer treatment outcomes

Cell-free DNA (cfDNA) shed into the blood was discovered in the late 1940s but with rapid advances in genomics and computational analytics in just the past few years, researchers now believe that studying tags, or modifications to this type of DNA, may lead to a better understanding of how to assess, and possibly modulate, treatment approaches for cancer and other diseases.

source https://www.sciencedaily.com/releases/2021/07/210727110212.htm