RESUMEN
Lung cancer (NSCLC and SCLC) is one of most frequent carcinoma. Lung cancer is at the top of the list of cancers causing mortality in males. Many patients are qualified to chemotherapy which causes neutropenia. The aim of this work was to evaluate the number and function of (phagocytosis, test of NBT reduction and MPO activity) of leukocytes in patients with lung cancer before chemotherapy, during leukopenia and after stimulation with granulocyte colony stimulating factor (G-CSF). Patients with lung cancer have increased number of leukocytes before the treatment. After chemotherapy the number of leukocytes decreases. Treatment with G-CSF increases the number of leukocytes but it doesn't increase their ability to phagocytosis and to NBT reduction.