This book provides multidisciplinary reviews of the mechanism of action and uses of methotrexate in the treatment of cancer, psoriasis, gynecologic and inflammatory diseases. The intended audience is composed of clinicians involved in the care of patients suffering from oncologic, gynecologic, rheumatic diseases as well as scientists involved in research into the pathogenesis and treatment of these diseases. This book is unique in that it provides a single, state-of-the-art source for information regarding the mechanism and use of methotrexate in many different areas of medicine.