The BMM consists of several cells including quiescent/activated hematopoietic stem cells (HSCs), osteoclast cells, osteoblastic cells, endothelial cells, myeloid cells (myeloid-derived suppressor cells (MDSCs), tumor-associated macrophages (TAMs), and dendritic cells (DC)), lymphocytes (T cells, B cells and nature killer (NK) cells), bone marrow stromal cells (BMSCs) extracellular matrix (ECM), vasculature, and soluble factors such as growth factors, cytokines, chemokines.