Furthermore, we observed a significant correlation in the expression of PLK1 and NB stage progression (Kocak n = 649, p = 3.35 × 10−27; SEQC n = 498, p = 3.27 × 10−16, Versteeg (n = 88, p = 7.28 × 10−6; Figure 1D–F), suggesting that PLK1 plays a significant role in NB stage progression. Here, PLK1 is linked to neuroblastoma.