[Chronic lymphocytic and myeloid leukemia in the same patient].

A patient with chronic lymphocytic leukemia (CLL) treated with chlorambucil and prednisone developed chronic myelocytic leukemia (CML) five years later. An association between the two chronic leukemias has only rarely been reported. In the majority of cases the CLL preceded CML after which the malignancies coexisted morphologically in bone marrow and peripheral blood. In this case we report a suppression of CLL related symptoms and blood findings after the emergence of CML. However, immunophenotypic studies demonstrated a minor remaining population of CLL cells in the peripheral blood.