Figure 2

Scatterplot for correlating levels of ccf nDNA between breast cancer patients with a tumor size > 5 cm; (n = 4), >2 cm<5 cm; (n = 25) and < 2 cm; (n = 21). Significant difference in the levels of ccf nDNA could be found between tumors with a tumor size of >2 cm<5 cm and tumors with a tumor size of < 2 cm (P = 0.034). For the group of the tumor size > 5 cm, only 4 cases were recruited. (* significant correlation; Mann-Whitney-U-Test).