PLK1 and neoplasm: In the 111 samples of the French cohort, Plk1 mRNA levels did not correlate to the Fuhrman grade (a score used by pathologists to define the aggressiveness of the tumor, Fig. 1c), but high levels of Plk1 mRNA correlated with shorter DFS (39.1 months vs >100 months, p = 0.0004, Fig. 1d) and OS (63 months vs >100 months, p = 0.0005, Fig. 1e).