SOX2 and neoplasm: However, novimentin (found in glial-derived tumors- Fig.2I), or Sox2 positive cells (embryonic stem cell marker expressed in severalbrain tumors - Fig. 2J) were observed.Moreover, labeling tumor sections with lectin (which binds oligosaccharides on themembrane of endothelial cells) specifically revealed a positive staining within the tumormass, therefore indicating a vascularization of the tumors (Fig. 2H).