Study: NCT04947501

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Cyclophosphamide
Description: Administration of CTV - cycles 1 and 4~Days 1 \& 2: Cyclophosphamide 70 mg/kg/day (2100 mg/m2/day for patients \>10 years old), IV over 6 hrs.~Mesna 70 mg/kg (2100 mg/m2/day for patients \>10 years old) , by 24-hr IV infusion, starting with the cyclophosphamide infusion.~Days 1-4: Topotecan 2 mg/m2/day, IV over 30 minutes. Day 1: Vincristine 0.067 mg/kg (or 2 mg/m2, whichever is less) by IV piggyback; maximum dose is 2 mg.~\*\*\*\*\*\*\* Administration of CDV - cycle 3 Days 1 \& 2: Cyclophosphamide 70 mg/kg/day ((2100 mg/m2/day for patients \>10 years old), IV over 6 hrs.~Mesna 70 mg/kg ((2100 mg/m2/day for patients \>10 years old), by 24-hr IV infusion, starting with the cyclophosphamide infusion.~Days 1-3: Doxorubicin 25 mg/m2/day, by 24-hr IV infusion (total dose over 72 hr is 75 mg/m2).~Days 1-3: Vincristine 0.67 mg/m2/day or 0.022 mg/kg/day (whichever is less), by 24-hr IV infusion (total dose over 72 hr is 2 mg/m2 or 0.067 mg/kg); maximum dose is 0.67 mg/day, or 2mg over 72 hr.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Topotecan
Description: Administration of CTV - cycles 1 and 4~Days 1 \& 2: Cyclophosphamide 70 mg/kg/day (2100 mg/m2/day for patients \>10 years old), IV over 6 hrs.~Mesna 70 mg/kg (2100 mg/m2/day for patients \>10 years old) , by 24-hr IV infusion, starting with the cyclophosphamide infusion.~Days 1-4: Topotecan 2 mg/m2/day, IV over 30 minutes. Day 1: Vincristine 0.067 mg/kg (or 2 mg/m2, whichever is less) by IV piggyback; maximum dose is 2 mg.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Vincristine
Description: Administration of CTV - cycles 1 and 4~Days 1 \& 2: Cyclophosphamide 70 mg/kg/day (2100 mg/m2/day for patients \>10 years old), IV over 6 hrs.~Mesna 70 mg/kg (2100 mg/m2/day for patients \>10 years old) , by 24-hr IV infusion, starting with the cyclophosphamide infusion.~Days 1-4: Topotecan 2 mg/m2/day, IV over 30 minutes. Day 1: Vincristine 0.067 mg/kg (or 2 mg/m2, whichever is less) by IV piggyback; maximum dose is 2 mg.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Doxorubicin
Description: Administration of CDV - cycle 3 Days 1 \& 2: Cyclophosphamide 70 mg/kg/day ((2100 mg/m2/day for patients \>10 years old), IV over 6 hrs.~Mesna 70 mg/kg ((2100 mg/m2/day for patients \>10 years old), by 24-hr IV infusion, starting with the cyclophosphamide infusion.~Days 1-3: Doxorubicin 25 mg/m2/day, by 24-hr IV infusion (total dose over 72 hr is 75 mg/m2).~Days 1-3: Vincristine 0.67 mg/m2/day or 0.022 mg/kg/day (whichever is less), by 24-hr IV infusion (total dose over 72 hr is 2 mg/m2 or 0.067 mg/kg); maximum dose is 0.67 mg/day, or 2mg over 72 hr.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Ifosfamide
Description: Administration of ICE - cycle 2 Days 1-5: Ifosfamide 1500 mg/m2/day (50 mg/kg/day if weight is \<10 kg), IV over 6 hrs. Mesna 1500 mg/m2/day, by 24-hr IV infusion, starting with the ifosfamide infusion. Days 1-2: Carboplatin 400 mg/m2/day (13.3 mg/kg/day if weight is \<10 kg), IV over 1 hr. Days 1-5: Etoposide 100 mg/m2/day (3.3. mg/kg/day if weight is \<10 kg), IV over 2 hrs.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Etoposide
Description: Administration of ICE - cycle 2~Days 1-5: Ifosfamide 1500 mg/m2/day (50 mg/kg/day if weight is \<10 kg), IV over 6 hrs. Mesna 1500 mg/m2/day, by 24-hr IV infusion, starting with the ifosfamide infusion. Days 1-2: Carboplatin 400 mg/m2/day (13.3 mg/kg/day if weight is \<10 kg), IV over 1 hr. Days 1-5: Etoposide 100 mg/m2/day (3.3. mg/kg/day if weight is \<10 kg), IV over 2 hrs.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Carboplatin
Description: Administration of ICE - cycle 2~Days 1-5: Ifosfamide 1500 mg/m2/day (50 mg/kg/day if weight is \<10 kg), IV over 6 hrs. Mesna 1500 mg/m2/day, by 24-hr IV infusion, starting with the ifosfamide infusion. Days 1-2: Carboplatin 400 mg/m2/day (13.3 mg/kg/day if weight is \<10 kg), IV over 1 hr. Days 1-5: Etoposide 100 mg/m2/day (3.3. mg/kg/day if weight is \<10 kg), IV over 2 hrs.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Mesna
Description: Administration of CTV - cycles 1 and 4 Mesna 70 mg/kg (2100 mg/m2/day for patients \>10 years old) , by 24-hr IV infusion, starting with the cyclophosphamide infusion.~Administration of ICE - cycle 2 Mesna 1500 mg/m2/day, by 24-hr IV infusion, starting with the ifosfamide infusion.~Administration of CDV - cycle 3 Mesna 70 mg/kg ((2100 mg/m2/day for patients \>10 years old), by 24-hr IV infusion, starting with the cyclophosphamide infusion.