Other hematological malignancies consisted of multiple myeloma (13), myeloproliferative diseases (8), non-Hodgkin’s lymphoma (7), myelodysplasia (4), monoclonal gammopathy of unknown significance (3), chronic lymphocytic leukemia (2), and large granular lymphocytic leukemia (1). No differences between sex distribution in each group and no differences in the age distribution between CML patients and normal healthy donors were found. However, CML patients were significantly younger than patients with other hematological malignancies (P < .0003).