PRIOR CONCURRENT THERAPY: Biologic therapy: No prior murine monoclonal antibody therapy No other concurrent immunotherapy Chemotherapy: At least 4 weeks since prior chemotherapy and recovered No concurrent chemotherapy Endocrine therapy: See Disease Characteristics At least 2 weeks since prior changes in hormonal therapy including prednisone or dexamethasone At least 8 weeks since prior suramin OR documented plasma concentration less than 50 mg/mL (replacement doses of hydrocortisone allowed) Radiotherapy: See Disease Characteristics At least 4 weeks since prior radiotherapy and recovered No concurrent radiotherapy to only measurable lesion Surgery: See Disease Characteristics No concurrent surgery Other: No other concurrent anticancer agents