text: Stem cells give rise to normal blood components including red cells, white cells and platelets. Stem cells are normally located in the bone marrow and in the blood and can be harvested for a transplant. \n\nStem cell transplants are occuring right now. It all depends on the nature of the disease or treatment as to whether they can be used. My brother has already had a stem cell transplant using his own blood and will have another one using my other brother's stem cells. He is being treated for multiple myeloma - a cancer of the plazma cell.