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This phase II trial studies how well reduced doses of radiation therapy to the brain and spine (craniospinal) and chemotherapy work in treating patients with newly diagnosed type of brain tumor called WNT)/Wingless (WNT)-driven medulloblastoma. Recent studies using chemotherapy and radiation therapy have been shown to be effective in treating patients with WNT-driven medulloblastoma. However, there is a concern about the late side effects of treatment, such as learning difficulties, lower amounts of hormones, or other problems in performing daily activities. Radiotherapy uses high-energy radiation from x-rays to kill cancer cells and shrink tumors. Drugs used in chemotherapy, such as cisplatin, vincristine sulfate, cyclophosphamide and lomustine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving reduced craniospinal radiation therapy and chemotherapy may kill tumor cells and may also reduce the late side effects of treatment.
I. To estimate the progression-free survival (PFS) of children >= 3 years of age with wingless-type MMTV integration site family (WNT)/WNT-driven average-risk medulloblastoma using reduced craniospinal radiotherapy (CSI) (18 Gray [Gy]) with a limited target volume boost to the tumor bed of 36 Gy for a total of 54 Gy and reduced chemotherapy approach (no vincristine [vincristine sulfate] during radiotherapy and reduced-dose maintenance chemotherapy) and to monitor the PFS for early evidence that the outcome is unacceptable.
I. To prospectively test the hypothesis that deoxyribonucleic acid (DNA) methylation profiling will result in "real-time" classification of WNT-driven medulloblastoma.
II. To use the ALTE07C1 protocol to prospectively evaluate and longitudinally model the cognitive, social, emotional and behavioral functioning of children who are treated with reduced CSI (18 Gy) with a limited target volume boost to the tumor bed (to a total of 54 Gy) and reduced chemotherapy (reduced cisplatin, vincristine and lomustine [CCNU]).
I. To explore whether DNA methylation profiling of medulloblastoma samples will result in a "real-time" predictive classification scheme for the Sonic Hedgehog (SHH), Group 3 and Group 4 medulloblastoma subgroups according to the Heidelberg classifier.
RADIATION THERAPY: Beginning 4-5 weeks after surgery, patients undergo craniospinal radiation therapy 5 days a week for 6 weeks.
MAITENANCE THERAPY (WEEKS 1, 3, 5, and 7): Beginning 4-6 weeks after completion of radiation therapy patients receive lomustine orally (PO) on day 1, vincristine sulfate intravenously (IV) over 1 minute or via minibag on days 1, 8, and 15, and cisplatin IV over 6 hours on day 1. Treatment repeats every 42 days in the absence of disease progression or unacceptable toxicity.
MAINTENANCE THERAPY (WEEKS 2, 4, AND 6): Patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 2, mesna IV over 15-30 minutes on days 1 and 2, and vincristine sulfate IV over 1 minute or via minibag on days 1 and 8. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.
After completion of study treatment, patients are followed up every 3 months for 2 years, every 6 months for 2 years, and then annually for 6 years.
Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Untreated Childhood Medulloblastoma
Cisplatin, Cyclophosphamide, Laboratory Biomarker Analysis, Lomustine, Radiation Therapy, Vincristine Sulfate
Childrens Oncology Group
Not yet recruiting
Children's Oncology Group
Published on BioPortfolio: 2016-04-01T10:23:23-0400
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Preliminary cancer therapy (chemotherapy, radiation therapy, hormone/endocrine therapy, immunotherapy, hyperthermia, etc.) that precedes a necessary second modality of treatment.
Organs which might be damaged during exposure to a toxin or to some form of therapy. It most frequently refers to healthy organs located in the radiation field during radiation therapy.
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