A 63-year-old man came to a doctor with complaints of marked general weakness, poor appetite, weight loss, joint pain, and heaviness in the right subcostal area. Complete blood count shows the following: erythrocytes 3.4*10^12 / L, Hb-102 g /L, color index-0.9, platelets-640 *10⁹ / L, leukocytes-138 *10^9 / L, blasts -1 %, promyelocytes-2 %, myelocytes-13 %, juvenile-12 %, band neutrophils-16 %, segmented neutrophils-31 %, basophils-3 %, cosinophils-8 %, lymphocytes-9 %, monocytes-5 %, ESR-30 mm / hour. What is the provisional diagnosis