This clinical trial is focused on studying a type of cancer called Hodgkin lymphoma, which affects the lymphatic system, a part of the immune system. The study is specifically for children who have been newly diagnosed with advanced stages of this disease. The treatment being tested includes a combination of medications: brentuximab vedotin (also known by its code name SGN-35), Adriamycin, vinblastine, and dacarbazine. Brentuximab vedotin is a medication that targets cancer cells, and it is given as an infusion, which means it is administered directly into the bloodstream through a vein.
The purpose of this study is to find out how safe and tolerable the treatment is and to determine the best dose of brentuximab vedotin when used with the other medications. The study will also look at how well the treatment works in reducing the cancer. Participants will receive the treatment over several cycles, and their health will be monitored throughout the study to see how they respond to the treatment. Some participants may receive a placebo, which is a substance with no active medication, to compare the effects of the actual treatment.
The study is divided into two phases. In the first phase, the focus is on finding the right dose and checking for any side effects. In the second phase, the study will evaluate how effective the treatment is in achieving a complete response, which means the cancer is no longer detectable. The study will also assess how many participants can complete all six cycles of the treatment. The overall goal is to improve the treatment options for children with advanced Hodgkin lymphoma.



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