This clinical trial is focused on studying treatments for Neuroblastoma, a type of cancer that most commonly affects children. The study will explore the effectiveness of adding Bevacizumab to a chemotherapy regimen that includes Temozolomide, with or without Irinotecan, and also the combination of Topotecan with Temozolomide. Bevacizumab is a medication that can help prevent the growth of blood vessels that feed tumors, while Temozolomide, Irinotecan, and Topotecan are chemotherapy drugs that work by killing cancer cells or stopping them from growing.
The purpose of the study is to determine if these combinations can improve treatment outcomes for children whose neuroblastoma has returned or has not responded to previous treatments. Participants in the study will receive one of these treatment combinations, or a placebo, over a period of up to 24 months. The study will monitor the participants’ response to the treatment, including any changes in the size of the tumor and the overall health of the participants.
Throughout the study, the safety of the treatments will be closely monitored, and any side effects will be recorded. The study aims to provide valuable information on whether these treatment combinations can offer better outcomes for children with relapsed or refractory neuroblastoma, potentially leading to improved treatment options in the future.



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