EN
In the paper numerous activities of IL-6 toward various normal and neoplastic cells are reviewed.The role of this cytokine in pathophysiology of various disease including infections and inflammatory and autoimmune diseases as well as in leukaemias, lymphomas and other neoplastic diseases is presented.Potential clinical value of the IL-6 levels in the serum and the role of its recombinant form in the treatment of thrombocytopenia and some neoplastic diseases is also discussed.