Elevated PLK1 expression maintained predictive value across tumor stages—T2 (HR = 2.18, p < 0.001; Fig. 3D), N0 (HR = 2.29, p < 0.001; Fig. 3E), and M0 (HR = 2.05, p < 0.001; Fig. 3F)—as well as pathological stages I–III (HR = 1.93, p < 0.001; Fig. 3G). Here, PLK1 is linked to neoplasm.