BACKGROUND & OBJECTIVE:Some studies indicate that endothelial progenitor cells(EPCs) originated from the bone marrow participate in neoplastic angiogenesis,and that bone marrow origin of inflammatory cells potentially contribute to neoplastic invasion,angiogenesis and metastasis.This study was to observe the origin of neovascular endothelial cells and infiltration of bone marrow-originated inflammatory cells in a murine tumor model.METHODS:Healthy C57BL/6 mice were irradiated with 60Co at 8 Gy.Bone marrow c...