Cyclophosphamide and Prednisone With or Without Immunoglobulin in Treating Abnormal Muscle Movement in Children With Neuroblastoma

Inclusion Criteria:

* Newly diagnosed neuroblastoma (NBL) or ganglioneuroblastoma with tumor-associated opsoclonus-myoclonus-ataxia syndrome (OMA)

* Patients with NBL diagnosed within 6 months of OMA diagnosis AND patients with OMA diagnosed within 6 months of NBL diagnosis are eligible
* Must enroll on study within 4 weeks of diagnosis
* Presence of opsoclonus, myoclonus, and/or ataxia associated with neuroblastoma considered eligible
* Currently enrolled on COG neuroblastoma protocols: COG-ANBL00B1 or its successor
* Creatinine clearance or radioisotope GFR ≥ 70 mL/min OR serum creatinine based on age/gender as follows:

* ≤ 0.4 mg/dL (for patients 1 to 5 months of age)
* ≤ 0.5 mg/dL (for patients 6 to 11 months of age)
* ≤ 0.6 mg/dL (for patients 1 year of age)
* ≤ 0.8 mg/dL (for patients 2 to 5 years of age)
* ≤ 1.0 mg/dL (for patients 6 to 9 years of age)
* ≤ 1.2 mg/dL (for patients 10 to 12 years of age)
* ≤ 1.4 mg/dL (for female patients ≥ 13 years of age)
* ≤ 1.5 mg/dL (for male patients 13 to 15 years of age)
* ≤ 1.6 mg/dL (for male patients ≥ 16 years of age)
* No prior IV gamma globulin therapy
* No prior chemotherapy
* Concurrent chemotherapy allowed
* No prior prednisone or corticotropin

* Patients who have received ≤ 14 days of steroids are eligible
* Concurrent surgery allowed