Fig. 1.

Workflow concerning the analysis of cfDNA on enrolled patients. The NGS analysis, performed with Panels 1 and 2, is executed on the circulating DNA of the first sampling at time zero (T0). The sequential collecting starts from the seventh month to monitor the variants of clinical significance found in the NGS analysis. The quantification of cfDNA is performed on all liquid biopsies. cfDNA, circulating free DNA; ddPCR, droplet digital polymerase chain reaction; NGS, next-generation sequencing.