 
         
         
         Abstract
         
         Chemotherapeutic agents used for blood and marrow transplantation are administered
            at doses up to 10 times greater than what would be used in conventional treatment
            of malignancies. This aggressive use of chemotherapy, with or without concomitant
            radiation, is associated with multiple organ toxicities. Common, and frequently life-threatening
            toxicities include cardiac toxicity, veno-occlusive disease of the liver, idiopathic
            pneumonia, neurotoxicity, renal failure, and oral mucositis. Often these toxicities
            are difficult to distinguish from other treatment-related complications, such as infection.
            The precise mechanisms of these injuries are poorly understood, but may relate to
            depletion of antioxidants. Although preventative strategies do not appear to be particularly
            effective, prompt recognition of the problems may be life-saving.