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Rousseau J, Bennett J, Lim-Fat MJ. Brain Tumors in Adolescents and Young Adults: A Review. Semin Neurol 2023; 43:909-928. [PMID: 37949116 DOI: 10.1055/s-0043-1776775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Brain tumors account for the majority of cancer-related deaths in adolescents and young adults (AYAs), defined as individuals aged 15 to 39. AYAs constitute a distinct population in which both pediatric- and adult-type central nervous system (CNS) tumors can be observed. Clinical manifestations vary depending on tumor location and often include headaches, seizures, focal neurological deficits, and signs of increased intracranial pressure. With the publication of the updated World Health Organization CNS tumor classification in 2021, diagnoses have been redefined to emphasize key molecular alterations. Gliomas represent the majority of malignant brain tumors in this age group. Glioneuronal and neuronal tumors are associated with longstanding refractory epilepsy. The classification of ependymomas and medulloblastomas has been refined, enabling better identification of low-risk tumors that could benefit from treatment de-escalation strategies. Owing to their midline location, germ cell tumors often present with oculomotor and visual alterations as well as endocrinopathies. The management of CNS tumors in AYA is often extrapolated from pediatric and adult guidelines, and generally consists of a combination of surgical resection, radiation therapy, and systemic therapy. Ongoing research is investigating multiple agents targeting molecular alterations, including isocitrate dehydrogenase inhibitors, SHH pathway inhibitors, and BRAF inhibitors. AYA patients with CNS tumors should be managed by multidisciplinary teams and counselled regarding fertility preservation, psychosocial comorbidities, and risks of long-term comorbidities. There is a need for further efforts to design clinical trials targeting CNS tumors in the AYA population.
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Affiliation(s)
- Julien Rousseau
- Division of Neurology, Department of Medicine, Universite de Montreal, Montreal, Quebec, Canada
| | - Julie Bennett
- Division of Haematology/Oncology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Canadian AYA Neuro-Oncology Network (CANON), Toronto, Ontario, Canada
| | - Mary Jane Lim-Fat
- Canadian AYA Neuro-Oncology Network (CANON), Toronto, Ontario, Canada
- Division of Neurology, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
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Neth BJ, Raghunathan A, Kizilbash SH, Uhm JH, Breen WG, Johnson DR, Daniels DJ, Sener U, Carabenciov ID, Campian JL, Khatua S, Mahajan A, Ruff MW. Management and Long-term Outcomes of Adults With Medulloblastoma: A Single-Center Experience. Neurology 2023; 101:e1256-e1271. [PMID: 37524533 PMCID: PMC10516280 DOI: 10.1212/wnl.0000000000207631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 05/30/2023] [Indexed: 08/02/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Medulloblastomas are embryonal tumors predominantly affecting children. Recognition of molecularly defined subgroups has advanced management. Factors influencing the management and prognosis of adult patients with medulloblastoma remains poorly understood. METHODS We examined the management, prognostic factors, and, when possible, molecular subgroup differences (subset) in adult patients (aged 18 years or older) with medulloblastoma from our center (specialty Neuro-Oncology clinic within a large academic practice) diagnosed between 1992 and 2020. Molecular subtyping corresponding to the 2021 WHO Classification was performed. Kaplan-Meier estimates (with log-rank test) were performed for univariate survival analysis with Cox regression used for multivariate analyses. RESULTS We included 76 adult patients with medulloblastoma (62% male), with a median age of 32 years at diagnosis (range: 18-66) and median follow-up of 7.7 years (range: 0.6-27). A subset of 58 patients had molecular subgroup characterization-37 SHH-activated, 12 non-WNT/non-SHH, and 9 WNT-activated. Approximately 67% underwent gross total resection, 75% received chemotherapy at diagnosis, and 97% received craniospinal irradiation with boost. The median overall survival (OS) for the whole cohort was 14.8 years. The 2-, 5-, and 10-year OS rates were 93% (95% CI 88-99), 86% (78-94), and 64% (53-78), respectively. Survival was longer for younger patients (aged 30 years or older: 9.9 years; younger than 30 years: estimated >15.4 years; log-rank p < 0.001). There was no survival difference by molecular subgroup or extent of resection. Only age at diagnosis remained significant in multivariate survival analyses. DISCUSSION We report one of the largest retrospective cohorts in adult patients with medulloblastoma with molecular subtyping. Survival and molecular subgroup frequencies were similar to prior reports. Survival was better for adult patients younger than 30 years at diagnosis and was not significantly different by molecular subgroup or management characteristics (extent of resection, RT characteristics, or chemotherapy timing or regimen).
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Affiliation(s)
- Bryan J Neth
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Aditya Raghunathan
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Sani H Kizilbash
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Joon H Uhm
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - William G Breen
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Derek R Johnson
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - David J Daniels
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Ugur Sener
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Ivan D Carabenciov
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Jian L Campian
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Soumen Khatua
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Anita Mahajan
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN
| | - Michael W Ruff
- From the Departments of Neurology (B.J.N., J.H.U., D.R.J., U.S., I.D.C., M.W.R.), Pathology (A.R.), Medical Oncology (S.H.K., J.H.U., U.S., I.D.C., J.L.C., M.W.R.), Radiation Oncology (W.G.B., A.M.), Radiology (D.R.J.), Neurosurgery (D.J.D.), and Pediatrics (S.K.), Mayo Clinic, Rochester, MN.
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Genetic alterations of TP53 and OTX2 indicate increased risk of relapse in WNT medulloblastomas. Acta Neuropathol 2022; 144:1143-1156. [PMID: 36181537 PMCID: PMC9637613 DOI: 10.1007/s00401-022-02505-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 09/07/2022] [Accepted: 09/22/2022] [Indexed: 01/26/2023]
Abstract
This study aimed to re-evaluate the prognostic impact of TP53 mutations and to identify specific chromosomal aberrations as possible prognostic markers in WNT-activated medulloblastoma (WNT-MB). In a cohort of 191 patients with WNT-MBs, mutations in CTNNB1, APC, and TP53 were analyzed by DNA sequencing. Chromosomal copy-number aberrations were assessed by molecular inversion probe technology (MIP), SNP6, or 850k methylation array hybridization. Prognostic impact was evaluated in 120 patients with follow-up data from the HIT2000 medulloblastoma trial or HIT registries. CTNNB1 mutations were present in 92.2%, and APC mutations in 6.8% of samples. One CTNNB1 wild-type tumor gained WNT activation due to homozygous FBXW7 deletion. Monosomy 6 was present in 78.6%, and more frequent in children than adults. 16.1% of tumor samples showed TP53 mutations, of those 60% with nuclear positivity for the p53 protein. Loss of heterozygosity at the TP53 locus (chromosome 17p13.1) was found in 40.7% (11/27) of TP53 mutant tumor samples and in 12.6% of TP53 wild-type cases (13/103). Patients with tumors harboring TP53 mutations showed significant worse progression-free survival (PFS; 5-year-PFS 68% versus 93%, p = 0.001), and were enriched for chromosomes 17p (p = 0.001), 10, and 13 losses. Gains of OTX2 (14q22.3) occurred in 38.9% of samples and were associated with poor PFS and OS (5-year-PFS 72% versus 93%, p = 0.017 resp. 5-year-OS 83% versus 97%, p = 0.006). Multivariable Cox regression analysis for PFS/OS identified both genetic alterations as independent prognostic markers. Our data suggest that patients with WNT-MB carrying TP53 mutations or OTX2 gains (58.1%) are at higher risk of relapse. Eligibility of these patients for therapy de-escalation trials needs to be debated.
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Niehusmann P, Stensvold E, Leske H, Pietsch T, Goschzik T, Gielen GH, Due-Tønnessen B, Frič R, Nilssen Y, Brandal P. Molecular pathological insights reveal a high number of unfavorable risk patients among children treated for medulloblastoma and CNS-PNET in Oslo 2005-2017. Pediatr Blood Cancer 2022; 69:e29736. [PMID: 35570402 DOI: 10.1002/pbc.29736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 03/27/2022] [Accepted: 03/30/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND An unexplained regional difference in survival was observed in previous publications on outcome for children treated for medulloblastoma and supratentorial primitive neuroectodermal tumor (CNS-PNET) in Norway. We aimed now to reevaluate and perform a retrospective molecular-based risk stratification of all embryonal brain tumors (excluding atypical teratoid rhabdoid tumors [ATRT]) in pediatric patients, who underwent surgery and treatment at Oslo University Hospital between 2005 and 2017. PROCEDURE Specimens from all patients <20 years of age with initial diagnosis of medulloblastoma or CNS-PNET were reviewed. Molecular analyses comprised NanoString gene expression, molecular inversion probe profiling, Sanger sequencing, and 850K-methylation analysis. Whole chromosomal aberration signatures were assessed in standard-risk non-WNT/non-SHH medullobastomas for molecular risk stratification. RESULTS We identified 53 non-ATRT embryonal tumors among which 33 were medulloblastomas. Molecular genetic parameters including whole chromosomal aberration signatures allowed classification of 17 medulloblastomas as molecular high risk. These patients had a significantly worse 5-year overall survival than the remaining 16 medulloblastoma patients (52.9% vs. 87.1% p = 0.036). Five patients in our cohort had tumors that are considered as new entities in the 2021 classification of tumors of the central nervous system. Five tumors were re-classified as nonembryonal tumors after review. CONCLUSION Molecular-based risk stratification of standard-risk non-WNT/non-SHH medulloblastoma enabled superior identification of medulloblastomas with dismal prognosis. Our cohort demonstrated a significantly increased fraction of standard-risk non-WNT/non-SHH medulloblastoma with molecular high-risk profile compared to other studies, which might have contributed to previously reported unfavorable outcome data.
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Affiliation(s)
- Pitt Niehusmann
- Department of Neurology/Pathology, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, Institute of Clinical Medicine (KlinMED), University of Oslo, Oslo, Norway
| | - Einar Stensvold
- Department of Pediatrics, Oslo University Hospital, Oslo, Norway
| | - Henning Leske
- Department of Neurology/Pathology, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, Institute of Clinical Medicine (KlinMED), University of Oslo, Oslo, Norway
| | - Torsten Pietsch
- Institute of Neuropathology, DGNN Brain Tumor Reference Center, University of Bonn Medical Center, Bonn, Germany
| | - Tobias Goschzik
- Institute of Neuropathology, DGNN Brain Tumor Reference Center, University of Bonn Medical Center, Bonn, Germany
| | - Gerrit H Gielen
- Institute of Neuropathology, DGNN Brain Tumor Reference Center, University of Bonn Medical Center, Bonn, Germany
| | | | - Radek Frič
- Department of Neurosurgery, Oslo University Hospital, Oslo, Norway
| | - Yngvar Nilssen
- Department of Registration, Cancer Registry of Norway, Oslo, Norway
| | - Petter Brandal
- Department of Oncology, Oslo University Hospital, Oslo, Norway
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5
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Franceschi E, Giannini C, Furtner J, Pajtler KW, Asioli S, Guzman R, Seidel C, Gatto L, Hau P. Adult Medulloblastoma: Updates on Current Management and Future Perspectives. Cancers (Basel) 2022; 14:cancers14153708. [PMID: 35954372 PMCID: PMC9367316 DOI: 10.3390/cancers14153708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/22/2022] [Accepted: 07/26/2022] [Indexed: 11/16/2022] Open
Abstract
Medulloblastoma (MB) is a malignant embryonal tumor of the posterior fossa belonging to the family of primitive neuro-ectodermic tumors (PNET). MB generally occurs in pediatric age, but in 14–30% of cases, it affects the adults, mostly below the age of 40, with an incidence of 0.6 per million per year, representing about 0.4–1% of tumors of the nervous system in adults. Unlike pediatric MB, robust prospective trials are scarce for the post-puberal population, due to the low incidence of MB in adolescent and young adults. Thus, current MB treatments for older patients are largely extrapolated from the pediatric experience, but the transferability and applicability of these paradigms to adults remain an open question. Adult MB is distinct from MB in children from a molecular and clinical perspective. Here, we review the management of adult MB, reporting the recent published literature focusing on the effectiveness of upfront chemotherapy, the development of targeted therapies, and the potential role of a reduced dose of radiotherapy in treating this disease.
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Affiliation(s)
- Enrico Franceschi
- Nervous System Medical Oncology Department, IRCCS Istituto delle Scienze Neurologiche di Bologna, Via Altura 3, 40139 Bologna, Italy
- Correspondence:
| | - Caterina Giannini
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 59005, USA;
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy;
| | - Julia Furtner
- Department of Biomedical Imaging and Image-Guided Therapy, Medical University of Vienna, 1090 Vienna, Austria;
| | - Kristian W. Pajtler
- Hopp Children’s Cancer Center Heidelberg (KiTZ), 69120 Heidelberg, Germany;
- Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Consortium for Translational Cancer Research (DKTK), 69120 Heidelberg, Germany
- Department of Pediatric Oncology, Hematology and Immunology, Heidelberg University Hospital, 69120 Heidelberg, Germany
| | - Sofia Asioli
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy;
- Pituitary Unit, IRCCS Istituto Delle Scienze Neurologiche Di Bologna, Via Altura 3, 40139 Bologna, Italy
| | - Raphael Guzman
- Department of Neurosurgery, University Hospital of Basel, 4031 Basel, Switzerland;
| | - Clemens Seidel
- Department of Radiation Oncology, University Hospital Leipzig, 04103 Leipzig, Germany;
| | - Lidia Gatto
- Department of Oncology, AUSL of Bologna, 40139 Bologna, Italy;
| | - Peter Hau
- Wilhelm Sander NeuroOncology Unit & Department of Neurology, University Hospital Regensburg, 93055 Regensburg, Germany;
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Coltin H, Sundaresan L, Smith KS, Skowron P, Massimi L, Eberhart CG, Schreck KC, Gupta N, Weiss WA, Tirapelli D, Carlotti C, Li KKW, Ryzhova M, Golanov A, Zheludkova O, Absalyamova O, Okonechnikov K, Stichel D, von Deimling A, Giannini C, Raskin S, Van Meir EG, Chan JA, Fults D, Chambless LB, Kim SK, Vasiljevic A, Faure-Conter C, Vibhakar R, Jung S, Leary S, Mora J, McLendon RE, Pollack IF, Hauser P, Grajkowska WA, Rubin JB, van Veelen MLC, French PJ, Kros JM, Liau LM, Pfister SM, Kool M, Kijima N, Taylor MD, Packer RJ, Northcott PA, Korshunov A, Ramaswamy V. Subgroup and subtype-specific outcomes in adult medulloblastoma. Acta Neuropathol 2021; 142:859-871. [PMID: 34409497 PMCID: PMC10723183 DOI: 10.1007/s00401-021-02358-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 10/20/2022]
Abstract
Medulloblastoma, a common pediatric malignant central nervous system tumour, represent a small proportion of brain tumours in adults. Previously it has been shown that in adults, Sonic Hedgehog (SHH)-activated tumours predominate, with Wingless-type (WNT) and Group 4 being less common, but molecular risk stratification remains a challenge. We performed an integrated analysis consisting of genome-wide methylation profiling, copy number profiling, somatic nucleotide variants and correlation of clinical variables across a cohort of 191 adult medulloblastoma cases identified through the Medulloblastoma Advanced Genomics International Consortium. We identified 30 WNT, 112 SHH, 6 Group 3, and 41 Group 4 tumours. Patients with SHH tumours were significantly older at diagnosis compared to other subgroups (p < 0.0001). Five-year progression-free survival (PFS) for WNT, SHH, Group 3, and Group 4 tumours was 64.4 (48.0-86.5), 61.9% (51.6-74.2), 80.0% (95% CI 51.6-100.0), and 44.9% (95% CI 28.6-70.7), respectively (p = 0.06). None of the clinical variables (age, sex, metastatic status, extent of resection, chemotherapy, radiotherapy) were associated with subgroup-specific PFS. Survival among patients with SHH tumours was significantly worse for cases with chromosome 3p loss (HR 2.9, 95% CI 1.1-7.6; p = 0.02), chromosome 10q loss (HR 4.6, 95% CI 2.3-9.4; p < 0.0001), chromosome 17p loss (HR 2.3, 95% CI 1.1-4.8; p = 0.02), and PTCH1 mutations (HR 2.6, 95% CI 1.1-6.2; p = 0.04). The prognostic significance of 3p loss and 10q loss persisted in multivariable regression models. For Group 4 tumours, chromosome 8 loss was strongly associated with improved survival, which was validated in a non-overlapping cohort (combined cohort HR 0.2, 95% CI 0.1-0.7; p = 0.007). Unlike in pediatric medulloblastoma, whole chromosome 11 loss in Group 4 and chromosome 14q loss in SHH was not associated with improved survival, where MYCN, GLI2 and MYC amplification were rare. In sum, we report unique subgroup-specific cytogenetic features of adult medulloblastoma, which are distinct from those in younger patients, and correlate with survival disparities. Our findings suggest that clinical trials that incorporate new strategies tailored to high-risk adult medulloblastoma patients are urgently needed.
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Affiliation(s)
- Hallie Coltin
- Division of Haematology/Oncology, Hospital for Sick Children, 555 University Avenue, Toronto, ON, Canada
- Programme in Developmental and Stem Cell Biology, Arthur and Sonia Labatt Brain Tumour Research Centre, Hospital for Sick Children, Toronto, ON, Canada
| | - Lakshmikirupa Sundaresan
- Programme in Developmental and Stem Cell Biology, Arthur and Sonia Labatt Brain Tumour Research Centre, Hospital for Sick Children, Toronto, ON, Canada
| | - Kyle S Smith
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, MS 325, Room D2058, 262 Danny Thomas Place, Memphis, TN, 38105-3678, USA
| | - Patryk Skowron
- Programme in Developmental and Stem Cell Biology, Arthur and Sonia Labatt Brain Tumour Research Centre, Hospital for Sick Children, Toronto, ON, Canada
| | - Luca Massimi
- Department of Neurosurgery, Fondazione Policlinico A. Gemelli IRCCS, Catholic University Medical School, Rome, Italy
| | - Charles G Eberhart
- Department of Neuropathology and Ophthalmic Pathology, Johns Hopkins University, Baltimore, MD, USA
| | - Karisa C Schreck
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
| | - Nalin Gupta
- Departments of Neurological Surgery and Pediatrics, University of California, San Francisco, CA, USA
| | - William A Weiss
- Departments of Neurology, Neurological Surgery, and Pediatrics, University of California, San Francisco, CA, USA
| | - Daniela Tirapelli
- Department of Surgery and Anatomy, Faculty of Medicine of Ribeirão Preto, University of Sao Paulo, São Paulo, Brazil
| | - Carlos Carlotti
- Department of Surgery and Anatomy, Faculty of Medicine of Ribeirão Preto, University of Sao Paulo, São Paulo, Brazil
| | - Kay K W Li
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Marina Ryzhova
- NN Burdenko Neurosurgical Research Centre, Moscow, Russia
| | - Andrey Golanov
- NN Burdenko Neurosurgical Research Centre, Moscow, Russia
| | | | | | - Konstantin Okonechnikov
- Hopp Children's Cancer Center Heidelberg (KiTZ) and Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Damian Stichel
- Clinical Cooperation Unit Neuropathology (B300), German Cancer Research Center (DKFZ) and Department of Neuropathology, University of Heidelberg, University Hospital Heidelberg, Im Neuenheimer Feld 224, 69120, Heidelberg, Germany
| | - Andreas von Deimling
- Clinical Cooperation Unit Neuropathology (B300), German Cancer Research Center (DKFZ) and Department of Neuropathology, University of Heidelberg, University Hospital Heidelberg, Im Neuenheimer Feld 224, 69120, Heidelberg, Germany
| | - Caterina Giannini
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Scott Raskin
- Center for Cancer and Blood Disorders, Children's National Medical Center, Washington, DC, USA
| | - Erwin G Van Meir
- Department of Neurosurgery, O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham (UAB), Birmingham, AL, USA
| | - Jennifer A Chan
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - Daniel Fults
- Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA
| | - Lola B Chambless
- Department of Neurological Surgery, Vanderbilt Medical Center, Nashville, TN, USA
| | - Seung-Ki Kim
- Department of Neurosurgery, Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul, South Korea
| | - Alexandre Vasiljevic
- Centre de Pathologie et Neuropathologie Est, Centre de Biologie et Pathologie Est, Groupement Hospitalier Est, Hospices Civils de Lyon, Bron, France
- ONCOFLAM, Neuro-Oncologie Et Neuro-Inflammation Centre de Recherche en Neurosciences de Lyon, Lyon, France
| | - Cecile Faure-Conter
- Department of Pediatrics, Institut d'Hemato-Oncologie Pediatrique, Lyon, France
| | - Rajeev Vibhakar
- Department of Pediatrics, University of Colorado Denver, Aurora, CO, USA
| | - Shin Jung
- Department of Neurosurgery, Chonnam National University Research Institute of Medical Sciences, Chonnam National University Hwasun Hospital and Medical School, Hwasun-gun, Chonnam, South Korea
| | - Sarah Leary
- Cancer and Blood Disorders Center, Seattle Children's Hospital, Seattle, WA, USA
| | - Jaume Mora
- Developmental Tumor Biology Laboratory, Hospital Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
| | | | - Ian F Pollack
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Peter Hauser
- 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | | | - Joshua B Rubin
- Departments of Pediatrics, Anatomy and Neurobiology, Washington University School of Medicine and St Louis Children's Hospital, St Louis, MO, USA
| | - Marie-Lise C van Veelen
- Department of Neurosurgery, Brain Tumour Center, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
| | - Pim J French
- Department of Neurology, Brain Tumour Center, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
| | - Johan M Kros
- Department of Pathology, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Linda M Liau
- Department of Neurosurgery, David Geffen School of Medicine at University of California at Los Angeles, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Stefan M Pfister
- Hopp Children's Cancer Center Heidelberg (KiTZ) and Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Pediatric Oncology, Hematology and Immunology, University of Heidelberg, Heidelberg, Germany
| | - Marcel Kool
- Hopp Children's Cancer Center Heidelberg (KiTZ) and Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Noriyuki Kijima
- Department of Neurosurgery, Osaka University Graduate School of Medicine, Suita, Japan
| | - Michael D Taylor
- Programme in Developmental and Stem Cell Biology, Arthur and Sonia Labatt Brain Tumour Research Centre, Hospital for Sick Children, Toronto, ON, Canada
| | - Roger J Packer
- Center for Cancer and Blood Disorders, Children's National Medical Center, Washington, DC, USA
| | - Paul A Northcott
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, MS 325, Room D2058, 262 Danny Thomas Place, Memphis, TN, 38105-3678, USA.
| | - Andrey Korshunov
- Clinical Cooperation Unit Neuropathology (B300), German Cancer Research Center (DKFZ) and Department of Neuropathology, University of Heidelberg, University Hospital Heidelberg, Im Neuenheimer Feld 224, 69120, Heidelberg, Germany.
| | - Vijay Ramaswamy
- Division of Haematology/Oncology, Hospital for Sick Children, 555 University Avenue, Toronto, ON, Canada.
- Programme in Developmental and Stem Cell Biology, Arthur and Sonia Labatt Brain Tumour Research Centre, Hospital for Sick Children, Toronto, ON, Canada.
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
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