Abstract
Clinical application of hematopoietic growth factors such as erythropoietin and granulocyte colony-stimulating factor is useful in the treatment of various diseases. Moreover, molecular targeting therapy is effective in certain hematological diseases. Differentiation therapy of acute promyelocytic leukemia by all-trans retinoic acid, treatment of chronic myeIogenous leukemia by imatinib mesilate, and treatment of B cell malignant lymphoma by anti-CD20 antibody are the most popular treatments in this field.