For example, KIF5B plays an important role in determining phenotype and aggressiveness of breast cancer (Moamer et al., 2019), high expression level of KIF11 was associated with unfavorable prognosis in clear cell renal cell carcinoma (Jin et al., 2019), KIF2C/4A/10/11/14/18B/20A/23 predict poor prognosis and promote cell proliferation in hepatocellular carcinoma (Li et al., 2020b) and KIF26A could inhibit migration and invasion (Ma et al., 2021). The gene discussed is KIF2C; the disease is breast cancer.