As the subventricular zone (SVZ) is often proposed to be the source of CSCs [6, 8], we evaluated mRNA expression levels of ALDH1A3 as well as other well-known CSC markers including Nestin, CD133, CD44, YKL40, OLIG2, SOX2 in GBM. This evidence concerns the gene ALDH1A3 and glioblastoma.