OBJECTIVES: * Determine the efficacy of sargramostim (GM-CSF) in enhancing monoclonal antibody 3F8-mediated ablation in patients with high-risk neuroblastoma. * Determine the prognostic impact of minimal residual bone marrow disease on relapse-free survival of patients treated with this regimen. * Compare the effects of short-term (2-hour intravenous) vs prolonged (subcutaneous release) daily GM-CSF on granulocyte activation, in order to establish the optimal route for tumor-cell kill in these patients. OUTLINE: This is an open-label study. Patients are stratified according to evaluable disease (yes \[primary refractory bone marrow disease\] vs no \[no evidence of disease\]). Patients receive sargramostim (GM-CSF) subcutaneously on days -5 to 4 and monoclonal antibody 3F8 IV over 0.5-1.5 hours on days 0-4. Treatment repeats every 3 weeks for 4 courses and then every 8 weeks for up to a total of 24 months in the absence of disease progression or unacceptable toxicity. Beginning after 2 courses of GM-CSF and monoclonal antibody 3F8, patients also receive oral isotretinoin twice daily on days 1-14 (when no monoclonal antibody 3F8 is administered). Treatment with isotretinoin repeats approximately every 28 days for 6 courses. PROJECTED ACCRUAL: A total of 340 patients will be accrued for this study.
DISEASE CHARACTERISTICS: * Diagnosis of neuroblastoma by histopathology OR bone marrow metastases and high urine catecholamine levels * Disease must meet risk-related treatment guidelines and any of the following International Neuroblastoma Staging System stages: * Stage 4 with (any age) OR without (\> 18 months of age of age) MYCN amplification * MYCN-amplified other than stage 1 * No evidence of disease (i.e., in complete response/remission or very good partial response/remission) OR disease resistant to standard therapy (i.e., incomplete response in bone marrow) * No progressive disease or MIBG-avid soft tissue tumor PATIENT CHARACTERISTICS: * No existing renal, cardiac, hepatic, neurologic, pulmonary, or gastrointestinal toxicity ≥ grade 3 * No human anti-mouse antibody (HAMA) titer greater than 1,000 Elisa units/mL * No history of allergy to mouse proteins * No active life-threatening infection * Not pregnant * Negative pregnancy test PRIOR CONCURRENT THERAPY: * Not specified
are designated in this study