Fig. 2From: Liquid biopsies based on DNA methylation as biomarkers for the detection and prognosis of lung cancerMultiple liquid biopsy methods. Clinical information can be obtained from liquid biopsies. Among them, the main objects of liquid biopsy are cell-free DNA (cfDNA), circulating tumor cells (CTCs), and exosomes. Liquid biopsy is minimally invasive. Particularly, the collection of sputum, saliva, and urine is completely noninvasive. Hence, liquid biopsy has a promising clinical applicationBack to article page