"Simple blood tests for cancer diagnosis and post-treatment assessment are getting closer all the time. New research has shown that a new assay for measuring circulating tumor DNA (ctDNA) could detect essentially all stage II-IV non-small-cell lung cancers (NSCLC), and is even about 50% sensitive in finding stage I NSCLC as well."
" 'Analysis of ctDNA has the potential to revolutionize detection and monitoring of tumors,' wrote investigators led by senior study author Maximilian Diehn, MD, PhD, of Stanford University School of Medicine, in Nature Medicine. 'Noninvasive access to cancer-derived DNA is particularly attractive for solid tumors, which cannot be repeatedly sampled without invasive procedures.' "