Newly diagnosed, histologically confirmed, unresectable stage III NSCLC patients, amenable to receive standard of care chemoradiotherapy with or without durvalumab maintenance, will be enrolled in this study. Whole blood collection will be conducted during the treatment for ctDNA detection in specific time-points of interest. Next-generation sequencing using commercially available panels, and analysis of ctDNA aberrant methylation will be performed. Results will be correlated to patients' recurrence times and survival outcomes.
