In tumors injected in LV-proximal and LV-intermediate locations we observed a significantly higher percentage of Ki67+/HuNu+ GBM cells than in LV-distal tumors (LV-proximal: 23.36%, LV-Intermediate: 23.48%, LV-Distal: 11.41%; Figures 1C–F), indicating an increase in GBM proliferative index dependent on proximity to the LV. This evidence concerns the gene MKI67 and glioblastoma.