DNMT3A and neoplasm: Co-expression of DNMT1 and DNMT3a was significantly associated with menopause state (Pearson Chi-Square test, P = 0.008; Table 4) and location of the tumor (Pearson Chi-Square test, P = 0.036; Table 4), while co-expression of DNMT1 and DNMT3b was significantly associated with menopause state (Pearson Chi-Square test, P = 0.001; Table 4) and location of the tumor (Pearson Chi-Square test, P = 0.015; Table 4).