Adverse events

Thalidomide: Start at 3 mg/kg (rounded to nearest 50 mg), increasing dose weekly by 50 mg as tolerated to 24 mg/kg (max 1,000 mg); Celecoxib: \< 20 kg at 100 mg; 20-50 kg at 200 mg; \> 50 kg at 400 mg; Fenofibrate: 90 mg/m2 (max 200 mg); Etoposide: 50 mg/m2; Cyclophosphamide: 2.5 mg/kg (max 100 mg); Patients receive oral etoposide once daily on days 1-21 and 43-63 (weeks 1-3 and 7-9) and oral cyclophosphamide once daily on days 22-42 (weeks 4-6). Patients also receive oral thalidomide once daily, oral celecoxib twice daily, and oral fenofibrate once daily in weeks 1-9. Treatment repeats approximately every 9 weeks for at least 3 courses in the absence of disease progression or unacceptable toxicity. Patients receive alternating etoposide and cyclophosphamide pulses (i.e., etoposide-cyclophosphamide-etoposide during courses 1 and 3 and cyclophosphamide-etoposide-cyclophosphamide during course 2).