PATIENT CHARACTERISTICS: Age: 70 and under Performance status: 0-2 Life expectancy: No severe limitation due to nonmalignant disease Hematopoietic: Not specified Hepatic: No severe hepatic disease Bilirubin no greater than 2.0 mg/dL Transaminases no greater than 3 times normal Renal: No severe renal disease Creatinine no greater than 1.5 mg/dL Creatinine clearance at least 60 mL/min Cardiovascular: No symptomatic cardiac disease LVEF at least 50% Pulmonary: No severe pulmonary disease FEV1 and FVC at least 75% of normal Other: No history of severe cystitis with cyclophosphamide No HIV infection No severe personality disorder or severe mental illness No other condition that would markedly increase the morbidity and mortality of transplantation (e.g., substance abuse) Patients with borderline parameters of organ function, performance status, or mental status are entered at the discretion of the transplant team