Scientists have found traces of cancer DNA in blood samples taken over three years before diagnosis, suggesting ultra-early cancer detection might be possible. Researchers at Johns Hopkins used whole genome sequencing on decades-old samples and discovered tumor-specific DNA even in tiny plasma amounts. Despite the challenges of old and limited samples, the technology accurately flagged cancer in some cases. Experts say it’s a big step toward futuristic, early screenings, though large-scale validation is still needed. If proven, this could allow doctors to detect and treat cancer long before symptoms show—potentially saving lives with much earlier intervention.
Credit: Science News
