Fig. 5

Histopathological examination of tissues and HeLa cell-derived tumors after the injection of hUC-MSCs into NOD SCID mice (HE staining, 10 ×). A The lymphocytes in the spleens of the animals in the low-dose group exhibited proliferation and a dense arrangement. B In the medium-dose group, more monocytes accumulated near the central vein in the liver. C The tumor cell masses in the axilla of the model group contained large areas of central necrosis