KRT20 and neoplasm: While no significant correlation between CK20 mRNA detection in blood samples and overall survival (p = 0.261) or tumor-specific survival (p = 0.196) could be determined (Figure 3A), a significant correlation between bone marrow CK20 positivity and overall survival for EC patients with UICC stages I and II (p = 0.023) could be observed (Figure 3B,C).