- 1. Subject previously diagnosed with multiple myeloma based either on the standard or the International Myeloma Foundation (IMF) diagnostic criteria as defined in Appendix A 2. Subjects must have relapsed or relapsed/refractory disease after at least 2 prior lines of therapy as defined in Appendix D 3. Monoclonal protein in the serum of ³ 1 gm/dL or monoclonal light chain in the urine protein electrophoresis of ³ 200 mg/ 24 hours, or measurable light chains by free light chain assay of ³ 10 mg/dL, or measurable plasmacytoma 4. Age ≥ 18 years at the time of signing the informed consent form 5. ECOG performance status < 2 6. Life expectancy > 3 months 7. Subjects must have the following laboratory parameters: