MKI67 and central nervous system cancer: Spearman’s correlation analysis further revealed that the miR-193a-3p expression was inversely correlated with Ki-67 expression in patients with glioblastomas (high-grade) (P <0.01; Figure 1D), while no significant correlation was observed between miR-193a-3p and Ki-67 expression in patients with low-grade gliomas (P = 0.07; Figure 1E).