🧬 Detect, Decode, Decide: The Promise of Liquid Biopsy Can a blood test tell us what cancer is doing before imaging can? 🩸 Circulating tumor DNA (ctDNA) can identify actionable variants, track treatment response, detect resistance, and reveal molecular residual disease. In colorectal cancer, molecular relapse was detected ~8.7 months earlier than with imaging surveillance. 🔬 But important…