Alemtuzumab is the type of drug known as a "monoclonal antibody". The antibody binds to a specific protein (antigen) called CD52. CD52 is found on the surface of normal lymphocytes and monocytes. When the antibody binds to the protein on the surface of the lymphocyte or monocyte it causes the cell to die. The goal of the study is to learn if killing normal lymphocytes and monocytes with alemtuzumab will result in regression (lessening) of the cancer cells.