Fig. 4From: Lack of tumorigenesis and protumorigenic activity of human umbilical cord mesenchymal stem cells in NOD SCID micePhotos of tumors from each group on day 57 (HeLa). The tumors in each group were the same size, and no differences were significant. This result indicated that low, medium and high doses of hUC-MSCs did not significantly promote or inhibit the growth and metastasis of HeLa cell-derived tumorsBack to article page