Several articles have elucidated the functions of KIF11 in breast cancers—for example, Pei et al. demonstrated that KIF11 was upregulated in 95.8% paraffin-embedded archival breast cancer biopsies, and decreased expression of KIF11 inhibited the proliferation of breast cancer cells in vitro and in vivo (Pei et al., 2017). This evidence concerns the gene KIF11 and breast cancer.