Fig. 1From: The functional and clinical roles of liquid biopsy in patient-derived modelsAn overview of liquid biopsy. The main contents of liquid biopsy include the analysis of CTCs, EV, and cfDNA/ctDNA, which have their own strengths and weaknesses. CTC: circulating tumor cell; cfDNA: cell-free DNA; ctDNA: circulating tumor DNA; EV: extracellular vesicle. By FigdrawBack to article page