CHI3L1 and neoplasm: These tumor stem-like cells yielded phenocopies of the original tumors in intracerebral xenografts (for complete description see [28]) and had a molecular profile as seen by qPCR similar to fetal neural stem cells with respect to stem cell markers (ie SOX2, Musashi1, Nestin and FABP7/BLBP) while overexpressing the mesenchymal markers YKL40, SNAIL1 and SNAIL2 compared to normal neural stem cells (Figure 3G).