The correlation between CCNA2 expression and MLH1, MSH2, MSH6, PMS2, and EPCAM is illuminated in Figure 9(e), showing that CCNA2 expression was positively correlated with MLH1 in 26 cancer types, with MSH2 and MSH6 in 31 cancer types, with PMS2 in 24 cancer types, and with EPCAM in 15 cancer types. Here, MSH2 is linked to cancer.