Through the analysis of GEO data related to non-small-cell lung cancer (NSCLC), Ni et al. (2018) found six hub genes related to the pathogenesis and prognosis of NSCLC, including CCNB1. In view of the above findings, CCNB1 can be used as a prognosis-related biomarker for a variety of cancers, and assuredly, there is no lack of related research on CCNB1 as a prognosis-related biomarker for BC. This evidence concerns the gene CCNB1 and breast cancer.