Clinical Tumor Immunology contains the proceedings of the Symposium of Clinical Tumor Immunology held in Brussels, Belgium, on May 26-29, 1975) and organized by the European Organization for Research on Treatment of Cancer in cooperation with the Department of Immunology of the University Hospital of Brussels. The papers explore progress in the field of clinical tumor immunology and cover topics ranging from general mechanisms in tumor immunity to tumor antigens and immunotherapy. A classification of leukemias and lymphomas is also presented. Comprised of 48 chapters, this book begins with an overview of the biological activities of the circulating thymic hormone, followed by a discussion on macrophage secretions affecting the growth of other cells. The reader is then introduced to immune cellular mechanisms at the site of the tumor; the use of the leukocyte migration technique in studies of tumor-directed cellular immunity in malignant melanoma; and immunological approaches to the identification of leukemic cells. Subsequent chapters deal with preclinical approaches in tumor immunochemotherapy; mediation of immune responses to human tumor antigens with "immune" RNA; and the role of transfer factor in human cancer. This monograph will be of interest to oncologists and immunologists.