Significantly, we found positive correlations between its expression and a panel of endothelial markers (CD34, CDH5, ENG, EPHA2, FLT1 (VEGFR1), KDR (VEGFR2)) that have already been described as poor prognosis factors in GBM [29,30,31,32,33] (Figure 1B and Supplementary Figure S1C). Here, FLT1 is linked to glioblastoma.