Fig. 5From: Cross-sectional analysis of circulating tumor DNA in primary colorectal cancer at surgery and during post-surgery follow-up by liquid biopsyLiquid biopsy during clinical follow-up. a Representative results of ctDNA levels at surgery and 3 months after surgery (t1). b Three examples of ctDNA responses to chemotherapy, apparently complete. Progressive disappearance of ctDNA may be appreciated in boxed areas. Abbreviations: NTC, no template controlBack to article page