Remarkably higher expression of PLK1 was observed in all types of cervical cancer patients with lymph node metastasis or CESC patients with lymph node metastasis than in those without lymph node metastasis (X2 = 29.859, P < 0.001; X2 = 29.324, P < 0.001) (Tables 1 and 2). The gene discussed is PLK1; the disease is cervical cancer.