Combination Chemotherapy Followed by Second-Look Surgery and Radiation Therapy in Treating Children With Nonmetastatic Medulloblastoma or Primitive Neuroectodermal Tumor

Study Overview
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Brief Summary
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This phase III trial is studying how well combination chemotherapy followed by second-look surgery and radiation therapy works in treating children with nonmetastatic medulloblastoma or primitive neuroectodermal tumor. Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Combining more than one drug and combining chemotherapy with surgery and radiation therapy may kill more tumor cells.

Detailed Description
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PRIMARY OBJECTIVES: I. To determine if the proposed treatment for children >= 8.0 months and < 3 years of age at registration with non-metastatic (M0) medulloblastoma is more effective than the combined treatments given to children of the same age and extent of disease on POG 9233, as measured by event-free survival (EFS) rates. SECONDARY OBJECTIVES: I. To assess the feasibility and safety of the planned use of second look surgery and focal conformal radiation therapy following chemotherapy. II. To determine the acute and chronic toxicities associated with the above treatment regimens. III. To describe the neuropsychological and neuroendocrine effects of this systemic chemotherapy, surgery, and local, conformal radiation. IV. To determine the feasibility and validity of a centralized telephone interview based data collection method for neuropsychological evaluations. V. To determine the incidence of atypical teratoid/rhabdoid tumor (AT/RT) in children enrolled on this study. OUTLINE: This is a multicenter study. Patients receive induction chemotherapy consisting of vincristine IV on days 1, 8, and 15; cisplatin IV over 6 hours on day 1; cyclophosphamide IV over 30 minutes on day 2; and oral etoposide daily on days 2-22. Treatment repeats every 28 days for a total of 4 courses. After completion of induction chemotherapy, patients with residual disease undergo a second resection. Within 4 weeks after completion of induction chemotherapy or second resection, patients receive focal conformal radiotherapy daily, 5 days a week, for 6 weeks. Four weeks after completion of radiotherapy, patients receive alternating treatments of maintenance chemotherapy. Patients receive vincristine IV on days 1, 8, and 15 and cyclophosphamide IV over 30 minutes on day 1 of courses 1, 3, 5, and 7 and oral etoposide daily on days 1-21 of courses 2, 4, 6, and 8. Treatment continues every 28 days for 8 courses. Patients are followed every 3 months for 1 year, every 4 months for 1 year, every 6 months for 1 year, and then annually thereafter.

Official Title
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Systemic Chemotherapy, Second Look Surgery and Conformal Radiation Therapy Limited to the Posterior Fossa and Primary Site for Children &gt;/= to 8 Months and &lt;3 Years With Non-metastatic Medulloblastoma: A Children&Apos;s Oncology Group Phase III Study

Conditions
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Untreated Childhood Medulloblastoma, Untreated Childhood Supratentorial Primitive Neuroectodermal Tumor

Intervention / Treatment
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* Drug: cisplatin
* Drug: cyclophosphamide
* Drug: vincristine sulfate
* Drug: etoposide
* Procedure: therapeutic conventional surgery
* Radiation: 3-dimensional conformal radiation therapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Histologically confirmed primary medulloblastoma or posterior fossa primitive neuroectodermal tumor Prior definitive tumor resection within 6 weeks of study No evidence of metastases Hemoglobin at least 10 g/dL Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 AST less than 2.5 times normal Bilirubin less than 1.5 mg/dL Creatinine less than 1.2 mg/dL Creatinine clearance greater than 70 mL/min No prior chemotherapy No prior radiotherapy See Disease Characteristics

Ages Eligible for Study
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Maximum Age: 3 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Chemotherapy, surgery, radiation therapy<br>Patients receive induction chemotherapy consisting of vincristine sulfate IV on days 1, 8, and 15; cisplatin IV over 6 hours on day 1; cyclophosphamide IV over 30 minutes on day 2; and oral etoposide daily on days 2-22. Treatment repeats every 28 days for a total of 4 courses. After completion of induction chemotherapy, patients with residual disease undergo a therapeutic conventional surgery (second resection). Within 4 weeks after completion of induction chemotherapy or second resection, patients receive 3-dimensional conformal radiation therapy daily, 5 days a week, for 6 weeks. Four weeks after completion of 3-dimensional conformal radiation therapy, patients receive alternating treatments of maintenance chemotherapy. Patients receive vincristine sulfate IV on days 1, 8, and 15 and cyclophosphamide IV over 30 minutes on day 1 of courses 1, 3, 5, and 7 and oral etoposide daily on days 1-21 of courses 2, 4, 6, and 8. Treatment continues every 28 days for 8 courses. | Drug: cisplatin<br>* Given IV<br>* Other names: DDP;Drug: cyclophosphamide<br>* Given IV<br>* Other names: Endoxana;Drug: vincristine sulfate<br>* Given IV<br>* Other names: Vincasar PFS;Drug: etoposide<br>* Given PO<br>* Other names: VP-16-213;Procedure: therapeutic conventional surgery<br>* Undergo surgery<br>Radiation: 3-dimensional conformal radiation therapy<br>* Undergo 3-dimensional conformal radiation therapy<br>* Other names: 3D-CRT;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Event-free survival rate |  | 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Acute and chronic toxicities associated with the treatment regimens |  | Up to 9 years | 
| Neuropsychological and neuroendocrine effects of this systemic chemotherapy, surgery, and local, conformal radiation |  | Up to 9 years | 
| Feasibility and validity of a centralized telephone interview based data collection method for neuropsychological evaluations |  | Up to 9 years | 
| Incidence of atypical teratoid and/or rhabdoid tumor |  | Up to 9 years |