We observed different expression level of SDF-1, RANTES, IL-6 and IL-8 in medulloblastoma-BTICs, SDF-1, RANTES, IL-6 and IL-8 in AT/RT-BTICs and SDF-1, IL-6, IL-8 and IGF-1 in glioblastoma-BTICs. This evidence concerns the gene CXCL12 and glioblastoma.