SIOP Ependymoma II - An International Clinical Program for the diagnosis and treatment of children, adolescents and young adults with Ependymoma

Overall program Main residence in one of the participating countries Age < 22 years old at diagnosis Newly diagnosed intracranial or spinal ependymoma (all WHO grades) including ependymoma variants: cellular, papillary myxopapillary, clear-cell and tanicytic or anaplastic ependymoma Delivery to national referral pathology centre of FFPE tumour tissue blocks (or charged slides with sufficient interpretable material and curls in an Eppendorf tube) Written informed consent for data and study biological samples collection All patients and / or their parents or legal guardians willing and able to comply with protocol schedule and agree to sign a written informed consent Patients must be affiliated to a Social Security System in countries where this is mandatory After Initial surgery, patients will be enrolled in one of 3 different interventional strata where they will be offered a set of therapeutic interventions based on the outcome of the intervention (no measurable residue vs residual inoperable disease), their age and/or their eligibility /suitability to receive radiotherapy. Patients with centrally and histologically confirmed intracranial ependymoma (histology confirmed by National Reference centre for Biology and Pathology review) meeting the following criteria will be enrolled into one of interventional strata: •Main residence in one of the participating countries, •Age below 22 years old at the diagnosis, •Newly diagnosed with an ependymoma WHO grade II and III, including ependymoma variants: cellular, papillary, clear-cell and tanycytic or anaplastic ependymoma. •Post-menarchal female not pregnant or nursing (breast feeding) and with a negative beta-HCG pregnancy test prior to commencing the trial, •Males and females of reproductive age and childbearing potential with effective contraception (see section 4.1.2.4 Definition of highly effective methods of contraception) for the duration of their treatment and 6 month after the completion of their treatment, •Patients and/or their parents or legal guardians willing and able to comply with scheduled visits, treatment plan, laboratory tests and other study procedure Specific inclusion criteria have been defined for each stratum of the program. Stratum 1: •Age > 12 months and < 22 years at time of study entry •No residual measurable ependymoma based on the central neuroradiological review (detailed in protocol) •Histologically confirmed WHO Grade II-III ependymoma by central pathological review •No metastasis on spinal MRI and on CSF cytology assessments •No previous radiotherapy •No previous chemotherapy (except steroids) •No co-existent unrelated disease (e.g. renal, hematological) at the time of study entry •No medical contraindication to radiotherapy and chemotherapy, •No signs of infection •Adequate bone marrow function(detailed in protocol) •Adequate liver function (detailed in protocol) •Adequate renal function (In case of suspected compromised renal function, glomerular filtration should be measured by an isotope GFR method such as EDTA clearance or by creatinine clearance:detailed in protocol) Stratum 2: •Age > 1 year and < 22 years at time of entry to study •Residual non reoperable measurable ependymoma based on central neuro-radiological review (detailed in protocol) •Histologically confirmed WHO Grade II III ependymoma by central pathological review •No metastasis on spinal MRI and on CSF cytology assessments •No previous radiotherapy •No previous chemotherapy (except steroids) •No co-existent unrelated disease (e.g. renal, hematological) at the time of study entry •No medical contraindication to radiotherapy and chemotherapy, •No signs of infection •Adequate bone marrow function (detailed in protocol) •Adequate liver function (In case of suspected compromised renal function, glomerular filtration should be measured by an isotope GFR method such as EDTA clearance or by creatinine clearance:detailed in protocol) Stratum 3 •Children younger than 12 months at time of entry to study or any children ineligible to receive radiotherapy due to age at diagnosis, tumour location or clinician/parent decision and according to national criteria •Histologically confirmed WHO Grade II-III ependymoma by central pathological review •Adequate bone marrow function(detailed in protocol) •Adequate liver function (detailed in protocol) •Adequate renal function (In case of suspected compromised renal function, glomerular filtration should be measured by an isotope GFR method such as EDTA clearance or by creatinine clearance:detailed in protocol) •No previous chemotherapy •No previous radiotherapy •No contraindication to chemotherapy Patients that do not fulfill the inclusion criteria of one of the interventional strata will be enrolled and followed up into an observational study and descriptive analysis will be performed

All interventional stata •Tumour entity other than primary intracranial ependymoma •Primary diagnosis predating the opening of SIOP Ependymoma II •Patients with WHO grade I ependymoma including ependymoma variants: myxopapillary ependymomas and subependymomas •Patients with spinal cord location of the primary tumour •Participation within a different trial for treatment of ependymoma •Age ≥ 22 years •Contraindication to one of the IMP used in this stratum according to the SmPC related to the products used in the country concerned. (see SmPC in appendix 4) •Concurrent treatment with any anti-tumour agents •Inability to tolerate chemotherapy •Unable to tolerate intravenous hydration •Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration, or may interfere with the interpretation of study results in the judgment of the Investigator •Pre-existing mucositis, peptic ulcer, inflammatory bowel disease, ascites, or pleural effusion •Pregnancy and breast feeding Stratum 1 and 2: •Ineligible to receive radiotherapy •Patient for whom imaging remains RX despite all effort to clarify the MRI conclusion Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration, or may interfere with the interpretation of study results in the judgement of the Investigator Stratum 3: NHS R&D Form IRAS Version 3.5 12 130101/737949/14/8 •Pre-existing mucositis, peptic ulcer, inflammatory bowel disease, ascites, or pleural effusion •Pregnancy and breast feeding Stratum 1 and 2: •Ineligible to receive radiotherapy •Patient for whom imaging remains RX despite all effort to clarify the MRI conclusion Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration, or may interfere with the interpretation of study results in the judgement of the Investigator Stratum 3: •Pre-existing severe hepatic (liver) and/or renal (kidney) damage Family history of severe epilepsy •Presence of previously undiagnosed mitochondrial disorder detected by screening as part of trial •Elevated blood ammonium level ≥ 1.5 x upper limit of the normal •Elevated Blood lactate level ≥ 1.5 x upper limit of the normal Other severe acute or chronic medical or laboratory abnormality that may increase the risk associated with study participation or investigational product administration, or may interfere with the interpretation of study results in the judgement of the Investigator