9Bone marrow transplantation has emerged as a major form of treatment for a broad range of human diseases. Marrow transplantation has many unique biologic features and its principles differ markedly from the transplantation of solid organs. This volume overviews the present status of bone marrow transplantation and summarizes recent progress and controversies. Ad- vances in defining the underlying biology of marrow transplantation are discussed. The current status of several major clinical problem areas are reviewed, including engraftment, acute and chronic graft-versus-host dis- ease, immunodeficiency, and opportunistic infections. The therapeutic role of allogeneic and autologous bone marrow transplantation is discussed, and results are compared with alternative therapies. lX List of contributors ANASETII, CLAUDIO, M. D., Fred Hutchinson Cancer Research Center, 1124 Columbia Street, Seattle, Washington 98104 APPELBAUM, FRED, M. D., Fred Hutchinson Cancer Research Center, 1124 Columbia Street, Seattle, Washington 98104 ARMITAGE, JAMES 0., M. D., Department of Internal Medicine, Univer- sity of Nebraska Medical Center, 42nd and Dewey Avenue, Omaha, Nebraska 68105 BEATIY, PATRICK G., M. D., Fred Hutchinson Cancer Research Center, 1124 Columbia Street, Seattle, Washington 98104 BIERMAN, PHILIP J., M. D., Department of Internal Medicine, Univer- sity of Nebraska Medical Center, 42nd and Dewey Avenue, Omaha, Nebraska 68105 BUTTURINI, ANNA, M. D., Department of Pediatrics, University of Parma School of Medicine, Parma, Italy CHAMPLIN, RICHARD, M. D.