A large number of studies have shown that PLK1 is one of the serine‐threonine kinase families highly expressed in prostate cancer,35 neuroblastoma cells,36 acute myeloid leukaemia,37 cervical cancer38 and other malignant tumours, which plays an important role in the initiation, maintenance and completion of mitosis. The gene discussed is PLK1; the disease is prostate cancer.