OBJECTIVES:
Primary
* To determine the toxicities and feasibility of bolus and metronomic cyclophosphamide when given in combination with zoledronic acid with and without bevacizumab in patients with recurrent or refractory high-risk neuroblastoma.
Secondary
* To preliminarily evaluate the antitumor activity of this regimen in these patients within the confines of a pilot study.
OUTLINE: This is a multicenter study.
Patients receive cyclophosphamide IV over 1 hour and zoledronic acid IV over 15 minutes on day 0 and oral cyclophosphamide once daily on days 1-27 in course 1. In course 2 and all subsequent courses, patients receive bevacizumab IV over 30-90 minutes on days 0 and 14, cyclophosphamide IV over 1 hour and zoledronic acid IV over 15 minutes on day 1, and oral cyclophosphamide once daily on days 0 and 2-27. Treatment repeats every 28 days for up to 2 years\* in the absence of disease progression or unacceptable toxicity.
NOTE: \*Patients may receive up to 13 doses of zoledronic acid.
After completion of study treatment, patients are followed periodically.
