PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 60-100% Life expectancy: At least 5 months Hematopoietic: WBC at least 3,500/mm3 Platelet count at least 75,000/mm3 LDH no greater than 2 times upper limit of normal No active bleeding Hepatic: Albumin at least 3.5 mg/dL Renal: Not specified Other: Not pregnant or less than 3 months postpartum Fertile patients must use effective contraception No serious underlying medical conditions No known immunodeficiency No active infection No retinal or choroidal eye disease