PATIENT CHARACTERISTICS: Age: 12 and over Performance status: ECOG 0-3 Life expectancy: At least 4 weeks Hematopoietic: See Disease Characteristics Hepatic: Bilirubin no greater than 2.0 mg/dL AST and ALT less than 3 times upper limit of normal Renal: Creatinine clearance at least 50 mL/min Cardiovascular: No symptomatic cardiac disease No active ischemic heart disease No poorly controlled congestive heart failure No myocardial infarction within past 6 months Cardiac ejection fraction at least 40% Pulmonary: No symptomatic pulmonary disease No symptomatic restrictive or obstructive lung disease Other: Not pregnant or nursing Fertile patients must use effective contraception No active infections, unless receiving antibiotics and clinically stable Fever caused by tumor allowed HIV negative No other active malignant disease Curatively treated prior malignancies allowed No severe neurologic disease