Multiple myeloma: must have received prior chemotherapy; consolidation of chemotherapy by autografting prior to nonmyeloablative HCT is permitted Multiple myeloma must have received prior chemotherapy; consolidation of chemotherapy by autografting prior to nonmyeloablative HCT is permitted Multiple myeloma: Must have received prior chemotherapy; consolidation of chemotherapy by autografting prior to nonmyeloablative hematopoietic cell transplant (HCT) is permitted Multiple myeloma or plasma cell leukemia must have received more than one line of prior chemotherapy; consolidation of chemotherapy by autografting prior to nonmyeloablative HCT is permitted Multiple myeloma must have received prior chemotherapy; consolidation of chemotherapy by autografting prior to nonmyeloablative HCT is permitted