Providing the right therapy at the right time has proven more difficult in the world of cancer than in other disease areas thanks to the variability in treatment response, but a new study hints that this problem may be at least partly solved for non-small cell lung cancer (NSCLC). A study presented at this year’s meeting of the American Society for Radiation Oncology (ASTRO) in San Diego shows that circulating tumor DNA (ctDNA) can provide therapeutic guidelines for oligometastatic forms of the disease, including when high-dose radiation therapy may or may not be indicated.