Expert physicians and clinical researchers summarize and explain all the recent advances in the biology and treatment of bone marrow-based malignancy. On the biological side, the authors show the characteristics of the malignant cell and describe the significant roles played by oncogenic changes, chromosomal anomalies, Kaposi's sarcoma herpes virus, and cytokines. New epidemiological findings and prognostic factors are also analyzed. On the clinical side, the authors provide a comprehensive review of conventional treatment regimens, as well as a discussion of newer experimental approaches involving immunologic targeting, inhibitors of drug resistance, and antitumor agents.