Chronic lymphocytic leukemia and lymphosarcoma associated with multiple myeloma: report of three cases.

Three patients had the rare occurrence of multiple myeloma coexisting with chronic lymphocytic leukemia or lymphosarcoma. It is not possible at present to resolve the question as to whether these two diseases represent part of the spectrum of a single B-cell disease or wether multiple myeloma and lymphoproliferative disorders are two separate entities, which may rarely occur by coincidence in the same patient.