Moreover, CCNA2, CCNB2, KIF11, BUB1B, NCAPG, CCNB1, DLGAP5, MAD2L1, and ASPM were notably associated with poor OS and RFS of patients with BC, whereas CDK1 was only related to unfavorable OS (Figure 9) (P < 0.05). Here, CCNB2 is linked to breast cancer.