Tandem High-dose Chemotherapy and Autologous Stem Cell Rescue in Patients With High-risk Neuroblastoma

Samsung Medical Center

Status and phase: Completed; Phase 2

Conditions: Neuroblastoma

Treatments: Drug: Cyclophosphamide; Drug: Melphalan; Radiation: Total body irradiation; Drug: Etoposide; Drug: Carboplatin; Drug: Thiotepa

Study type: Interventional

Funder types: Other

Identifiers

NCT00793845

2008-07-002

Details and patient eligibility

About

The purpose of this study is to evaluate the efficacy and toxicity of tandem HDCT/ASCR in children with high-risk neuroblastoma. In the present study, a single arm trial of tandem HDCT/ASCR will be carried out. In the present study, the investigators will investigate whether tandem HDCT/ASCR might improve the survival of patients with high-risk neuroblastoma with acceptable toxicity.

Full description

The prognosis of high-risk neuroblastoma after conventional chemoradiotherapy is generally poor. Therefore, a strategy using high-dose chemotherapy and autologous stem cell rescue (HDCT/ASCR) has been explored to improve the prognosis of patients with high-risk neuroblastoma. This strategy is based on the hypothesis that dose escalation might improve the survival of children with high-risk neuroblastoma. The results of randomized trials comparing HDCT/ASCR with chemotherapy alone showed a better event-free survival (EFS) in the HDCT/ASCR arm than in the continuous chemotherapy arm. However, the overall EFS was unsatisfactory.

In this context, investigators have examined the efficacy of double or triple tandem HDCT/ASCR to further improve the outcome of high-risk neuroblastoma patients. George et al. carried out a single arm trial of tandem transplantation as consolidation therapy, and reported improved long-term survival (5-year progression-free survival 47%) with acceptable toxicity. Kletzel et al. also conducted a single arm trial of triple tandem transplantation and reported improved survival (3-year EFS 57%). They demonstrated that further dose escalation using sequential HDCT/ASCR might result in further improvements in the survival of patients with high-risk neuroblastoma.

Investigators in the present study also carried out tandem transplantation as consolidation therapy, and reported improved long-term survival (5-year progression-free survival 62%) with acceptable toxicity. However, throughout our previous study, multiple modifications were made in the treatment plan, which resulted in significant variability over time between patients. This variability may create doubt as to whether tandem HDCT/ASCR itself resulted in the improved outcome. In addition, toxic death rate was relatively high (15.4%), although final survival rate was very high (best survival rate ever reported). Therefore, prospective study is needed to evaluate the efficacy and toxicity of tandem HDCT/ASCR.

Enrollment: 40 estimated patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients with high-risk neuroblastoma
• Patients with intermediate-risk neuroblastoma if gross tumor remained after surgery

Exclusion criteria

• Patients with progressive disease before high-dose chemotherapy
• Patients whose parents want to stop or change the planned treatment
• Patients with organ toxicities of NCI grade >2 before high-dose chemotherapy

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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40 participants in 1 patient group

High risk neuroblastoma

Experimental group

Description:

1. Conventional chemotherapy (9 cycles) 2. Surgery conventional chemotherapy (after 6 cycles of chemotherapy) 3. Tandem HDCT/autoSCT * First HDCT (cyclophosphamide, etoposide, carboplatin) * Second HDCT (total body irradiation, thiotepa, melphalan) 4. Local radiotherapy 5. Retinoic acid, interleukin-2

Treatment:

Radiation: Total body irradiation

Drug: Cyclophosphamide

Drug: Etoposide

Drug: Thiotepa

Drug: Melphalan

Drug: Carboplatin