PBK and lip and oral cavity carcinoma: Kaplan-Meier analysis further supported the prognostic value of PBK/TOPK expression in oral cancer according to these characteristics (log rank p values: 0.014, 0.005, 0.012, 0.048, and 0.050 for patients of age <57, smoking, moderate and poor differentiation, late clinical stage, and advanced N value, respectively, Figure 2B).