Figure 2From: Genotyping cell-free tumor DNA in the blood to detect residual disease and drug resistanceClinical applications of cell-free DNA analysis. cfDNA can be used in (1) diagnosis (2,3) to detect residual disease after surgery, (4) to monitor the response to therapy and (5) follow-up, and (6) to detect resistance. cfDNA, cell-free DNA; CTC, circulating tumor cells.Back to article page