The significantly prolonged event-free survival in patients with lower PLK1 expression implied potential prognostic stratification ability of PLK1 expression, which was consistent with the findings from the work by (Chhavi et al., 2010) that PLK1 expression was negatively correlated with the survival of malignant uterine cervix patients. The gene discussed is PLK1; the disease is uterine cervix neoplasm.