The IL13Rα2pos and mesenchymal tumor lines PBT015, PBT017-4, PBT030 and U251T (Figure 3) were shown in our previous work to be lysed by IL13-zetakine+ T cells, and co-injected IL13-zetakine T cells ablate in vivo tumor initiation of these same lines [11]. This evidence concerns the gene IL13 and neoplasm.