PRIOR CONCURRENT THERAPY: Prior therapy allowed -Patient Characteristics-- Age: Over 1 year at diagnosis Performance status: Not specified Hematopoietic: Absolute neutrophil count at least 500/mm3 (except for cases of bone marrow infiltration by tumor) Platelet count at least 100,000/mm3 (except for cases of bone marrow infiltration by tumor) Hepatic: Not specified Renal: Not specified Other: No history of allergy to mouse proteins Human antimouse antibodies (HAMA) less than 1,000 U/ml (with prior exposure to murine antibodies)