M.D. 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2. Risk Factors for the Development of Azotemia in Acute Tumor Lysis Syndrome........................................... 10 3. Metabolic Abnormalities That Occur during Acute Tumor Lysis Syndrome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 . . . . . . . . . . . . . . 4. Prevention of Acute Tumor Lysis Syndrome: Management prior to Beginning Chemotherapy . . . . . . . . . . . . . . . . . . . . . . . . . 13 . . . . . . . . . . 5. Posttreatment Management: Indications for Dialysis . . . . . . . . . . 14 . . References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 . . . . . . . . . . . . . .