Fig. 4

Distribution of detected positive droplets for MLH1 methylation in Normal and CRC Samples. With 1 ng input cfDNA, 20 normal and 28 CRC samples were treated or untreated with HpaII enzyme. In both populations the untreated samples showed higher positive droplets than the treated samples. Compared to normal samples, significant higher methylation levels in the cancer population (P < 0.001)