PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 60-100% Life expectancy: Not specified Hematopoietic: WBC greater than 3,500/mm3 Hemoglobin greater than 10 g/dL Platelet count greater than 150,000/mm3 Hepatic: Bilirubin less than 1.5 mg/dL GGT less than upper limit of normal (ULN) AST less than ULN PT less than 14 seconds No autoimmune hepatitis Renal: Creatinine less than 1.5 mg/dL OR Creatinine clearance greater than 60 mL/min Cardiovascular: No New York Heart Association class III or IV cardiac disease Pulmonary: No severe debilitating pulmonary disease Other: No active uncontrolled infection or infection requiring IV antibiotic treatment No evidence of human antimouse antibody No prior autoimmune disease No prior GI hemorrhage HIV negative Fertile patients must use effective contraception