Maintenance Chemotherapy or Observation Following Induction Chemotherapy and Radiation Therapy in Treating Patients With Newly Diagnosed Ependymoma

Ependymoma Clinical Trial

Official title:

Phase III Randomized Trial of Post-Radiation Chemotherapy in Patients With Newly Diagnosed Ependymoma Ages 1 to 21 Years

Clinical Trial Details — Status: Active, not recruiting

Administrative data

• NCT number: NCT01096368
• Other study ID #: ACNS0831
• Secondary ID: NCI-2011-0202910
• Status: Active, not recruiting
• Phase: Phase 3
• Start date: May 7, 2010
• Est. completion date: September 22, 2024

Study information

• Verified date: November 2023
• Source: Children's Oncology Group
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The primary aim of this randomized phase III trial was to study whether the addition of maintenance chemotherapy delivered after surgical resection and focal radiation would be better than surgery and focal radiation alone. The trial also studied if patients who received induction chemotherapy and then either achieved a complete response or went on to have a complete resection would also benefit from maintenance chemotherapy. Children ages 1-21 years with newly diagnosed intracranial ependymoma were included. There were 2 arms that were not randomized. One arm studied patients with Grade II tumors located in the supratentorial compartment that were completely resected. One arm studied patients with residual tumor and those patients all received maintenance chemotherapy after focal radiation. Chemotherapy drugs, such as vincristine sulfate, carboplatin, cyclophosphamide, etoposide, and cisplatin, 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 more than one drug (combination chemotherapy) may kill more tumor cells. Radiation therapy uses high-energy x-rays to kill tumor cells. Specialized radiation therapy that delivers a high dose of radiation directly to the tumor may kill more tumor cells and cause less damage to normal tissue. Giving chemotherapy in combination with radiation therapy may kill more tumor cells and allow doctors to save the part of the body where the cancer started.

Description:

PRIMARY OBJECTIVE:

I. To determine the event free survival (EFS) and overall survival (OS) of children with completely resected ependymoma treated with post-operative conformal radiation therapy (cRT) and then randomized to receive or not receive four cycles of post radiation maintenance chemotherapy (vincristine, cisplatin, etoposide and cyclophosphamide [VCEC]).

EXPLORATORY OBJECTIVES:

I. To estimate the EFS and OS of children with incompletely resected ependymoma who are unable to achieve a complete response (CR) by post-operative induction chemotherapy or by second surgery who will then be non-randomly assigned to cRT followed by four cycles of maintenance chemotherapy (VCEC).

II. To further evaluate the EFS and OS of children with supratentorial classic ependymoma who achieve a complete resection at first or second resection OR children who achieve a CR to short course induction chemotherapy following first surgery.

III. To evaluate whether the addition of maintenance chemotherapy post-radiation therapy contributes to neurobehavioral morbidity and reduced functional outcomes over time, compared to patients treated with radiation therapy followed by observation alone.

IV. To examine differences in neurobehavioral outcomes and quality of life of children treated with proton beam radiation therapy compared to children treated with conventional radiation delivery techniques.

V. To evaluate biologic prognostic factors in childhood ependymoma by studying molecular groups as defined by deoxyribonucleic acid (DNA) methylation profiling and immunohistochemistry, copy number variants to identify 1q gain in posterior fossa ependymomas, CDKN2A loss (homozygous deletion) in supratentorial ependymomas and specific genetic alterations such as RELA fusions, YAP1 fusions and the H3 K27M mutation on initial tumor samples and correlating these data with clinical outcome.

Va. To explore prognostic molecular signatures and genomic alterations in ependymomas by building upon the data derived from ACNS0121 to correlate biomarkers listed above with World Health Organization (WHO) grade, location, extent of resection, treatment, EFS and OS.

OUTLINE: This is a multicenter study partially randomized phase III study. Patients are randomized or non-randomly treated according to tumor location and extent of surgical resection or post-surgery induction chemotherapy response.

Arm I: Patients with classic histology(WHO Grade II) supratentorial ependymoma who have undergone microscopic gross total resection (GTR1) or achieved CR either after first or second resection or after post-operative induction chemotherapy are assigned to observation. For patients without GTR1, induction chemotherapy is comprised of vincristine intravenously (IV) over 1 minute on days 1 and 8 of cycles 1 and 2, carboplatin IV over 15-60 minutes on day 1 of cycles 1 and 2, and cyclophosphamide IV over 30-60 minutes on days 1-2 of cycle 1 only. Patients also receive etoposide IV over 60-120 minutes on days 1-3 of cycle 2 only. Cycle 1 continues for 3 weeks and cycle 2 continues for 4 weeks in the absence of disease progression or unacceptable toxicity.

ARM II: Patients with supratentorial ependymoma (Grade II without GTR1 or Grade III) or any infratentorial ependymoma who have undergone gross or near total resection (GTR or NTR) or achieved CR either after first or second resection or after post-operative induction chemotherapy are randomized to undergo conformal radiotherapy over 6-7 weeks followed by maintenance chemotherapy. Maintenance chemotherapy comprised of vincristine IV on days 1, 8, and 15 of cycles 1-3 only, etoposide IV over 60-120 minutes on days 1-3, cisplatin IV over 1-8 hours on day 1, and cyclophosphamide IV over 30-60 minutes on days 2-3. Treatment repeats every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity. Patients without GTR or NTR at enrollment require induction chemotherapy (see Arm I) and possibly second surgery before randomization.

ARM III: Patients with supratentorial ependymoma (Grade II without GTR1 or ST Grade III) or any infratentorial ependymoma (Grade II or III) who have undergone gross or near total resection or achieved CR either after first or second resection or after post-operative induction chemotherapy are randomized to undergo conformal radiotherapy over 6-7 weeks and then undergo observation. Patients without GTR or NTR at enrollment require induction chemotherapy (see Arm I) and possibly second surgery before randomization.

ARM IV: Patients with subtotal resection after induction chemotherapy (see Arm I) and second surgery are non-randomly assigned to Arm II treatment.

After completion of study therapy, patients are followed up every 4 months for 5 years, and then annually thereafter.

Recruitment information / eligibility

• Status: Active, not recruiting
• Enrollment: 479
• Est. completion date: September 22, 2024
• Est. primary completion date: December 31, 2021
• Accepts healthy volunteers: No
• Gender: All
• Age group: 12 Months to 21 Years

Eligibility

Inclusion Criteria:

• Patients must be newly diagnosed with histologically confirmed intracranial ependymoma; patients with classic ependymoma (WHO II) or anaplastic ependymoma (WHO III) are eligible, as are various subtypes described as clear cell, papillary, cellular or a combination of the above

• There is no minimum performance level; children with ependymoma may suffer neurologic sequelae as a result of their tumor or surgical measures taken to establish a diagnosis and resect the tumor; in the majority of cases, there is neurologic recovery; neurologic recovery is not likely to be impeded by protocol therapy

• REGULATORY: All patients and/or their parents or legal guardians must sign a written informed consent

• REGULATORY: All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met

Exclusion Criteria:

• Patients with evidence of metastatic disease will be excluded; any evidence of non-contiguous spread beyond the primary site as determined by pre or post-operative magnetic resonance (MR) imaging of brain, pre or post-operative MR imaging of the spine, and post-operative cerebrospinal fluid (CSF) cytology obtained from the lumbar CSF space (the requirement for lumbar CSF examination may be waived if deemed to be medically contraindicated); CSF cytology from a ventriculostomy or permanent ventriculoperitoneal (VP) shunt that reveals the presence of tumor cells is indicative of metastatic disease

• Patients with a diagnosis of spinal cord ependymoma, myxopapillary ependymoma, subependymoma, ependymoblastoma, or mixed glioma are NOT eligible

• No prior treatment other than surgical intervention and corticosteroids; patients are allowed to have had more than one attempt at resection prior to enrollment

• Pregnant female patients are not eligible for this study

• Post-menarchal females may not participate unless a pregnancy test with a negative result has been obtained

• Males and females of reproductive potential may not participate unless they have agreed to use an effective contraceptive method

• Lactating females may not participate unless they have agreed not to breastfeed a child while on this study

Related Conditions & MeSH terms

• Anaplastic Ependymoma
• Brain Ependymoma
• Cellular Ependymoma
• Clear Cell Ependymoma
• Ependymoma
• Papillary Ependymoma

Intervention

Radiation:
• 3-Dimensional Conformal Radiation Therapy
Patients undergo conformal radiotherapy

Drug:
• Carboplatin
Given IV
• Cisplatin
Given IV

Other:
• Clinical Observation
Patients undergo observation

Drug:
• Cyclophosphamide
Given IV
• Etoposide
Given IV

Biological:
• Filgrastim
Given SC or IV

Other:
• Laboratory Biomarker Analysis
Optional correlative studies

Drug:
• Mesna
Given IV
• Vincristine
Given IV

Locations

Country	Name	City	State
Australia	Monash Medical Center-Clayton Campus	Clayton	Victoria
Australia	Royal Brisbane and Women's Hospital	Herston	Queensland
Australia	Royal Children's Hospital-Brisbane	Herston	Queensland
Australia	John Hunter Children's Hospital	Hunter Regional Mail Centre	New South Wales
Australia	Women's and Children's Hospital-Adelaide	North Adelaide	South Australia
Australia	Royal Children's Hospital	Parkville	Victoria
Australia	Perth Children's Hospital	Perth	Western Australia
Australia	Princess Margaret Hospital for Children	Perth	Western Australia
Australia	Sydney Children's Hospital	Randwick	New South Wales
Australia	Queensland Children's Hospital	South Brisbane	Queensland
Australia	The Children's Hospital at Westmead	Westmead	New South Wales
Canada	Alberta Children's Hospital	Calgary	Alberta
Canada	University of Alberta Hospital	Edmonton	Alberta
Canada	IWK Health Centre	Halifax	Nova Scotia
Canada	McMaster Children's Hospital at Hamilton Health Sciences	Hamilton	Ontario
Canada	Kingston Health Sciences Centre	Kingston	Ontario
Canada	Children's Hospital	London	Ontario
Canada	Centre Hospitalier Universitaire Sainte-Justine	Montreal	Quebec
Canada	The Montreal Children's Hospital of the MUHC	Montreal	Quebec
Canada	Children's Hospital of Eastern Ontario	Ottawa	Ontario
Canada	CHU de Quebec-Centre Hospitalier de l'Universite Laval (CHUL)	Quebec
Canada	Janeway Child Health Centre	Saint John's	Newfoundland and Labrador
Canada	Saskatoon Cancer Centre	Saskatoon	Saskatchewan
Canada	Hospital for Sick Children	Toronto	Ontario
Canada	British Columbia Children's Hospital	Vancouver	British Columbia
Canada	CancerCare Manitoba	Winnipeg	Manitoba
New Zealand	Christchurch Hospital	Christchurch
New Zealand	Starship Children's Hospital	Grafton	Auckland
United States	Children's Hospital Medical Center of Akron	Akron	Ohio
United States	Albany Medical Center	Albany	New York
United States	University of New Mexico Cancer Center	Albuquerque	New Mexico
United States	Lehigh Valley Hospital-Cedar Crest	Allentown	Pennsylvania
United States	C S Mott Children's Hospital	Ann Arbor	Michigan
United States	Children's Healthcare of Atlanta - Egleston	Atlanta	Georgia
United States	Augusta University Medical Center	Augusta	Georgia
United States	Children's Hospital Colorado	Aurora	Colorado
United States	Dell Children's Medical Center of Central Texas	Austin	Texas
United States	Johns Hopkins University/Sidney Kimmel Cancer Center	Baltimore	Maryland
United States	University of Maryland/Greenebaum Cancer Center	Baltimore	Maryland
United States	Eastern Maine Medical Center	Bangor	Maine
United States	Walter Reed National Military Medical Center	Bethesda	Maryland
United States	Lehigh Valley Hospital - Muhlenberg	Bethlehem	Pennsylvania
United States	Children's Hospital of Alabama	Birmingham	Alabama
United States	University of Alabama at Birmingham Cancer Center	Birmingham	Alabama
United States	Saint Luke's Cancer Institute - Boise	Boise	Idaho
United States	Dana-Farber Cancer Institute	Boston	Massachusetts
United States	Massachusetts General Hospital Cancer Center	Boston	Massachusetts
United States	Tufts Children's Hospital	Boston	Massachusetts
United States	Montefiore Medical Center - Moses Campus	Bronx	New York
United States	Roswell Park Cancer Institute	Buffalo	New York
United States	University of Vermont and State Agricultural College	Burlington	Vermont
United States	UNC Lineberger Comprehensive Cancer Center	Chapel Hill	North Carolina
United States	Medical University of South Carolina	Charleston	South Carolina
United States	West Virginia University Charleston Division	Charleston	West Virginia
United States	Carolinas Medical Center/Levine Cancer Institute	Charlotte	North Carolina
United States	Novant Health Presbyterian Medical Center	Charlotte	North Carolina
United States	T C Thompson Children's Hospital	Chattanooga	Tennessee
United States	Lurie Children's Hospital-Chicago	Chicago	Illinois
United States	University of Chicago Comprehensive Cancer Center	Chicago	Illinois
United States	University of Illinois	Chicago	Illinois
United States	Cincinnati Children's Hospital Medical Center	Cincinnati	Ohio
United States	Cleveland Clinic Foundation	Cleveland	Ohio
United States	Rainbow Babies and Childrens Hospital	Cleveland	Ohio
United States	Columbia Regional	Columbia	Missouri
United States	Prisma Health Richland Hospital	Columbia	South Carolina
United States	Nationwide Children's Hospital	Columbus	Ohio
United States	Driscoll Children's Hospital	Corpus Christi	Texas
United States	Medical City Dallas Hospital	Dallas	Texas
United States	Geisinger Medical Center	Danville	Pennsylvania
United States	Dayton Children's Hospital	Dayton	Ohio
United States	Blank Children's Hospital	Des Moines	Iowa
United States	Ascension Saint John Hospital	Detroit	Michigan
United States	Wayne State University/Karmanos Cancer Institute	Detroit	Michigan
United States	Kaiser Permanente Downey Medical Center	Downey	California
United States	City of Hope Comprehensive Cancer Center	Duarte	California
United States	Michigan State University Clinical Center	East Lansing	Michigan
United States	Inova Fairfax Hospital	Falls Church	Virginia
United States	Sanford Broadway Medical Center	Fargo	North Dakota
United States	Hurley Medical Center	Flint	Michigan
United States	Broward Health Medical Center	Fort Lauderdale	Florida
United States	Golisano Children's Hospital of Southwest Florida	Fort Myers	Florida
United States	Lee Memorial Health System	Fort Myers	Florida
United States	Cook Children's Medical Center	Fort Worth	Texas
United States	University of Florida Health Science Center - Gainesville	Gainesville	Florida
United States	Helen DeVos Children's Hospital at Spectrum Health	Grand Rapids	Michigan
United States	Saint Vincent Hospital Cancer Center Green Bay	Green Bay	Wisconsin
United States	BI-LO Charities Children's Cancer Center	Greenville	South Carolina
United States	Greenville Cancer Treatment Center	Greenville	South Carolina
United States	Hackensack University Medical Center	Hackensack	New Jersey
United States	Connecticut Children's Medical Center	Hartford	Connecticut
United States	Penn State Children's Hospital	Hershey	Pennsylvania
United States	Memorial Regional Hospital/Joe DiMaggio Children's Hospital	Hollywood	Florida
United States	Kapiolani Medical Center for Women and Children	Honolulu	Hawaii
United States	Baylor College of Medicine/Dan L Duncan Comprehensive Cancer Center	Houston	Texas
United States	Ascension Saint Vincent Indianapolis Hospital	Indianapolis	Indiana
United States	Riley Hospital for Children	Indianapolis	Indiana
United States	University of Iowa/Holden Comprehensive Cancer Center	Iowa City	Iowa
United States	University of Mississippi Medical Center	Jackson	Mississippi
United States	Nemours Children's Clinic-Jacksonville	Jacksonville	Florida
United States	Bronson Methodist Hospital	Kalamazoo	Michigan
United States	Children's Mercy Hospitals and Clinics	Kansas City	Missouri
United States	East Tennessee Childrens Hospital	Knoxville	Tennessee
United States	Alliance for Childhood Diseases/Cure 4 the Kids Foundation	Las Vegas	Nevada
United States	Summerlin Hospital Medical Center	Las Vegas	Nevada
United States	Sunrise Hospital and Medical Center	Las Vegas	Nevada
United States	University Medical Center of Southern Nevada	Las Vegas	Nevada
United States	Dartmouth Hitchcock Medical Center/Dartmouth Cancer Center	Lebanon	New Hampshire
United States	University of Kentucky/Markey Cancer Center	Lexington	Kentucky
United States	Arkansas Children's Hospital	Little Rock	Arkansas
United States	University of Arkansas for Medical Sciences	Little Rock	Arkansas
United States	Saint Barnabas Medical Center	Livingston	New Jersey
United States	Loma Linda University Medical Center	Loma Linda	California
United States	Miller Children's and Women's Hospital Long Beach	Long Beach	California
United States	Cedars Sinai Medical Center	Los Angeles	California
United States	Children's Hospital Los Angeles	Los Angeles	California
United States	Norton Children's Hospital	Louisville	Kentucky
United States	Covenant Children's Hospital	Lubbock	Texas
United States	UMC Cancer Center / UMC Health System	Lubbock	Texas
United States	Valley Children's Hospital	Madera	California
United States	University of Wisconsin Carbone Cancer Center	Madison	Wisconsin
United States	Marshfield Medical Center-Marshfield	Marshfield	Wisconsin
United States	Loyola University Medical Center	Maywood	Illinois
United States	Saint Jude Children's Research Hospital	Memphis	Tennessee
United States	Banner Children's at Desert	Mesa	Arizona
United States	Nicklaus Children's Hospital	Miami	Florida
United States	University of Miami Miller School of Medicine-Sylvester Cancer Center	Miami	Florida
United States	Children's Hospital of Wisconsin	Milwaukee	Wisconsin
United States	NYU Winthrop Hospital	Mineola	New York
United States	Children's Hospitals and Clinics of Minnesota - Minneapolis	Minneapolis	Minnesota
United States	University of Minnesota/Masonic Cancer Center	Minneapolis	Minnesota
United States	West Virginia University Healthcare	Morgantown	West Virginia
United States	Morristown Medical Center	Morristown	New Jersey
United States	The Children's Hospital at TriStar Centennial	Nashville	Tennessee
United States	Vanderbilt University/Ingram Cancer Center	Nashville	Tennessee
United States	Rutgers Cancer Institute of New Jersey-Robert Wood Johnson University Hospital	New Brunswick	New Jersey
United States	Saint Peter's University Hospital	New Brunswick	New Jersey
United States	Yale University	New Haven	Connecticut
United States	The Steven and Alexandra Cohen Children's Medical Center of New York	New Hyde Park	New York
United States	Children's Hospital New Orleans	New Orleans	Louisiana
United States	Ochsner Medical Center Jefferson	New Orleans	Louisiana
United States	Tulane University Health Sciences Center	New Orleans	Louisiana
United States	Laura and Isaac Perlmutter Cancer Center at NYU Langone	New York	New York
United States	Memorial Sloan Kettering Cancer Center	New York	New York
United States	Mount Sinai Hospital	New York	New York
United States	NYP/Columbia University Medical Center/Herbert Irving Comprehensive Cancer Center	New York	New York
United States	Newark Beth Israel Medical Center	Newark	New Jersey
United States	Children's Hospital of The King's Daughters	Norfolk	Virginia
United States	Advocate Children's Hospital-Oak Lawn	Oak Lawn	Illinois
United States	Kaiser Permanente-Oakland	Oakland	California
United States	UCSF Benioff Children's Hospital Oakland	Oakland	California
United States	University of Oklahoma Health Sciences Center	Oklahoma City	Oklahoma
United States	Children's Hospital and Medical Center of Omaha	Omaha	Nebraska
United States	University of Nebraska Medical Center	Omaha	Nebraska
United States	Children's Hospital of Orange County	Orange	California
United States	AdventHealth Orlando	Orlando	Florida
United States	Arnold Palmer Hospital for Children	Orlando	Florida
United States	Nemours Children's Clinic - Orlando	Orlando	Florida
United States	Nemours Children's Hospital	Orlando	Florida
United States	Orlando Health Cancer Institute	Orlando	Florida
United States	Lucile Packard Children's Hospital Stanford University	Palo Alto	California
United States	Saint Joseph's Regional Medical Center	Paterson	New Jersey
United States	Nemours Children's Clinic - Pensacola	Pensacola	Florida
United States	Saint Jude Midwest Affiliate	Peoria	Illinois
United States	Children's Hospital of Philadelphia	Philadelphia	Pennsylvania
United States	Saint Christopher's Hospital for Children	Philadelphia	Pennsylvania
United States	Phoenix Childrens Hospital	Phoenix	Arizona
United States	Children's Hospital of Pittsburgh of UPMC	Pittsburgh	Pennsylvania
United States	Legacy Emanuel Children's Hospital	Portland	Oregon
United States	Naval Medical Center - Portsmouth	Portsmouth	Virginia
United States	Rhode Island Hospital	Providence	Rhode Island
United States	Virginia Commonwealth University/Massey Cancer Center	Richmond	Virginia
United States	Carilion Children's	Roanoke	Virginia
United States	Mayo Clinic in Rochester	Rochester	Minnesota
United States	University of Rochester	Rochester	New York
United States	Sutter Medical Center Sacramento	Sacramento	California
United States	University of California Davis Comprehensive Cancer Center	Sacramento	California
United States	Cardinal Glennon Children's Medical Center	Saint Louis	Missouri
United States	Mercy Hospital Saint Louis	Saint Louis	Missouri
United States	Washington University School of Medicine	Saint Louis	Missouri
United States	Johns Hopkins All Children's Hospital	Saint Petersburg	Florida
United States	Primary Children's Hospital	Salt Lake City	Utah
United States	Children's Hospital of San Antonio	San Antonio	Texas
United States	Methodist Children's Hospital of South Texas	San Antonio	Texas
United States	University of Texas Health Science Center at San Antonio	San Antonio	Texas
United States	Rady Children's Hospital - San Diego	San Diego	California
United States	UCSF Medical Center-Mission Bay	San Francisco	California
United States	UCSF Medical Center-Parnassus	San Francisco	California
United States	Memorial Health University Medical Center	Savannah	Georgia
United States	Maine Children's Cancer Program	Scarborough	Maine
United States	Seattle Children's Hospital	Seattle	Washington
United States	Sanford USD Medical Center - Sioux Falls	Sioux Falls	South Dakota
United States	Providence Sacred Heart Medical Center and Children's Hospital	Spokane	Washington
United States	Baystate Medical Center	Springfield	Massachusetts
United States	Southern Illinois University School of Medicine	Springfield	Illinois
United States	Overlook Hospital	Summit	New Jersey
United States	State University of New York Upstate Medical University	Syracuse	New York
United States	Madigan Army Medical Center	Tacoma	Washington
United States	Mary Bridge Children's Hospital and Health Center	Tacoma	Washington
United States	Saint Joseph's Hospital/Children's Hospital-Tampa	Tampa	Florida
United States	Scott and White Memorial Hospital	Temple	Texas
United States	Mercy Children's Hospital	Toledo	Ohio
United States	ProMedica Toledo Hospital/Russell J Ebeid Children's Hospital	Toledo	Ohio
United States	Banner University Medical Center - Tucson	Tucson	Arizona
United States	New York Medical College	Valhalla	New York
United States	Children's National Medical Center	Washington	District of Columbia
United States	MedStar Georgetown University Hospital	Washington	District of Columbia
United States	Saint Mary's Hospital	West Palm Beach	Florida
United States	Alfred I duPont Hospital for Children	Wilmington	Delaware
United States	Wake Forest University Health Sciences	Winston-Salem	North Carolina

Sponsors (2)

Lead Sponsor	Collaborator
Children's Oncology Group	National Cancer Institute (NCI)

Countries where clinical trial is conducted

United States,  Australia,  Canada,  New Zealand, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	EFS in Children Who Have Completely Resected Ependymoma at Initial Surgery and Are Treated With Post-radiation Maintenance Chemotherapy or Post-radiation Observation Only	Kaplan-Meier estimates of EFS are calculated from randomization date to first occurrence of disease progression, disease recurrence, second malignant neoplasm, or death from any cause. The comparison between randomized arms (post-radiation maintenance chemotherapy versus post-radiation observation only) for this stratum is conveyed by the hazard ratio and 95% Wald confidence interval.	Up to 10 years after enrollment. 5-year estimates of EFS are presented.
Other	EFS With Incomplete Resection After Initial Surgery, Then Achieved CR After Induction Chemotherapy or GTR/NTR After Second Surgery and Treated With Post-radiation Maintenance Chemotherapy or Post-radiation Observation Only	Kaplan-Meier estimates of EFS are calculated from randomization date to first occurrence of disease progression, disease recurrence, second malignant neoplasm, or death from any cause. The comparison between randomized arms (post-radiation maintenance chemotherapy versus post-radiation observation only) for this stratum is conveyed by the hazard ratio and 95% Wald confidence interval.	Up to 10 years after enrollment. 5-year estimates of EFS are presented.
Other	OS in Children Who Have Completely Resected Ependymoma at Initial Surgery and Are Treated With Post-radiation Maintenance Chemotherapy or Post-radiation Observation Only.	Kaplan-Meier estimates of OS are calculated from randomization date to death from any cause. The comparison between randomized arms (post-radiation maintenance chemotherapy versus post-radiation observation only) for this stratum is conveyed by the hazard ratio and 95% Wald confidence interval.	Up to 10 years after enrollment. 5-year estimates of OS are presented.
Other	OS in Children With Incomplete Resection After Initial Surgery Who Then Achieved CR After Induction Chemotherapy or GTR/NTR After Second Surgery and Are Treated With Post-radiation Maintenance Chemotherapy or Post-radiation Observation Only	Kaplan-Meier estimates of OS are calculated from randomization date to death from any cause. The comparison between randomized arms (post-radiation maintenance chemotherapy versus post-radiation observation only) for this stratum is conveyed by the hazard ratio and 95% Wald confidence interval.	Up to 10 years after enrollment. 5-year estimates of OS are presented.
Other	EFS of Children With Incompletely Resected Ependymoma Who Are Unable to Achieve a Complete Response (CR) by Post-operative Induction Chemotherapy or by Second Surgery and Who Are Non-randomly Assigned to Receive Maintenance Chemotherapy	The Kaplan-Meier estimate of EFS is calculated from enrollment date to first occurrence of disease progression, disease recurrence, second malignant neoplasm, or death from any cause.	Up to 10 years after enrollment. 5-year estimates of EFS are presented.
Other	OS of Children With Incompletely Resected Ependymoma Who Are Unable to Achieve a Complete Response (CR) by Post-operative Induction Chemotherapy or by Second Surgery and Who Are Non-randomly Assigned to Receive Maintenance Chemotherapy	The Kaplan-Meier estimate of OS is calculated from enrollment date to death from any cause.	Up to 10 years after enrollment. 5-year estimates of OS are presented.
Other	EFS of Children With Supratentorial Classic Ependymoma Who Achieve Complete Resection at First or Second Surgery or Children Who Achieve Complete Response (CR) After Induction Chemo and Who Are Non-randomly Assigned to Observation	The Kaplan-Meier estimate of EFS is calculated from enrollment date to first occurrence of disease progression, disease recurrence, second malignant neoplasm, or death from any cause.	Up to 10 years after enrollment. 5-year estimates of EFS are presented.
Other	OS of Children With Supratentorial Classic Ependymoma Who Achieve Complete Resection at First or Second Surgery or Children Who Achieve Complete Response (CR) After Induction Chemo and Who Are Non-randomly Assigned to Observation	The Kaplan-Meier estimate of OS is calculated from enrollment date to death from any cause.	Up to 10 years after enrollment. 5-year estimates of OS are presented.
Primary	Event-free Survival (EFS) in Children Who Have Completely Resected Ependymoma or Achieved CR and Are Treated With Post-radiation Maintenance Chemotherapy or Post-radiation Observation Only	Kaplan-Meier estimates of EFS are calculated from randomization date to first occurrence of disease progression, disease recurrence, second malignant neoplasm, or death from any cause. The comparison between randomized arms (post-radiation maintenance chemotherapy versus post-radiation observation only) is conveyed by the hazard ratio and 90.46% stagewise adjusted Wald confidence interval.	Up to 10 years after enrollment. 5-year estimates of EFS are presented
Primary	Overall Survival (OS) in Children Who Have Completely Resected Ependymoma or Achieved CR and Are Treated With Post-radiation Maintenance Chemotherapy or Post-radiation Observation Only	Kaplan-Meier estimates of OS are calculated from randomization date to death from any cause. The comparison between randomized arms (post-radiation maintenance chemotherapy versus post-radiation observation only) is conveyed by the hazard ratio and 90.46% stagewise adjusted Wald confidence interval.	Up to 10 years after enrollment. 5-year estimates of OS are presented.