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MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern

Medulloblastoma (MB) is the most frequent malignant childhood brain tumor. Four molecular subgroups have been described (WNT, SHH, group3, group4), which are associated with a different biological profile, prognosis, specific MRI characteristics and patterns of metastatic dissemination. We aimed to...

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Autores principales: Bellón, Marina Caballero, Moreno, Marta Pérez-Somarriba, Lavarino, Cinzia, Lopez, Vicente Santa-María, Martinez, Ofelia Cruz, Lopez, Jordi Muchart, La Madrid, Andrés Morales
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9164653/
http://dx.doi.org/10.1093/neuonc/noac079.451
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author Bellón, Marina Caballero
Moreno, Marta Pérez-Somarriba
Lavarino, Cinzia
Lopez, Vicente Santa-María
Martinez, Ofelia Cruz
Lopez, Jordi Muchart
La Madrid, Andrés Morales
author_facet Bellón, Marina Caballero
Moreno, Marta Pérez-Somarriba
Lavarino, Cinzia
Lopez, Vicente Santa-María
Martinez, Ofelia Cruz
Lopez, Jordi Muchart
La Madrid, Andrés Morales
author_sort Bellón, Marina Caballero
collection PubMed
description Medulloblastoma (MB) is the most frequent malignant childhood brain tumor. Four molecular subgroups have been described (WNT, SHH, group3, group4), which are associated with a different biological profile, prognosis, specific MRI characteristics and patterns of metastatic dissemination. We aimed to determine the imaging features of the metastatic MB and its molecular subgroup and their outcomes. Retrospective single-center analytic-observational study conducted from January 2004-January 2022 in a tertiary-care center. Pediatric patients with metastatic medulloblastoma at disease onset were included. We collected epidemiological and clinical characteristics, treatment received, and outcomes. The molecular subgroup was determined by its methylation profile. MRI were reviewed by the neuroradiologist. Sixty-three patients were diagnosed, 17 (26.9%) were metastatic. The median age at diagnosis was 5.1 years (range 2.1-17.5 years), 58.8% were male. According to histopathologic classification, fifteen patients (93.8%) were classic,1 (6.3%) desmoplastic. Molecular subgroup analysis showed 2 WNT (12.5%), 1 SHH (6.3%), 3 (18.8%) group 3 (G3) and 5 (31.2%) group 4 (G4). Four patients (25%) were classified as G3/G4 and 1 (6.3%) as mixed. Five patients (29.4%) were M2 and 12 patients (70.6%) were M3 according to Chang staging system. The location in the cerebellar hemispheres was only observed in SHH patient while G3 tumors presented homogeneous contrast enhancement. All WNT, G3 and G4 were located in IV ventricle. We found no association between molecular subgroup and metastatic site (intracranial vs spinal, Fisher test, p=0.45). All patients presented with metastasis in the third ventricular infundibular recess were G4. Four patients died, all of them were G3 or G3/G4. Our results supported the literature previously reported. According to the MRI imaging features, the molecular medulloblastoma subgroups could be suggested. The presence of metastasis in the infundibular recess suggested MB group 4. However, the dissemination pattern could not be associated with any subgroup in our series.
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spelling pubmed-91646532022-06-05 MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern Bellón, Marina Caballero Moreno, Marta Pérez-Somarriba Lavarino, Cinzia Lopez, Vicente Santa-María Martinez, Ofelia Cruz Lopez, Jordi Muchart La Madrid, Andrés Morales Neuro Oncol Medulloblastoma Medulloblastoma (MB) is the most frequent malignant childhood brain tumor. Four molecular subgroups have been described (WNT, SHH, group3, group4), which are associated with a different biological profile, prognosis, specific MRI characteristics and patterns of metastatic dissemination. We aimed to determine the imaging features of the metastatic MB and its molecular subgroup and their outcomes. Retrospective single-center analytic-observational study conducted from January 2004-January 2022 in a tertiary-care center. Pediatric patients with metastatic medulloblastoma at disease onset were included. We collected epidemiological and clinical characteristics, treatment received, and outcomes. The molecular subgroup was determined by its methylation profile. MRI were reviewed by the neuroradiologist. Sixty-three patients were diagnosed, 17 (26.9%) were metastatic. The median age at diagnosis was 5.1 years (range 2.1-17.5 years), 58.8% were male. According to histopathologic classification, fifteen patients (93.8%) were classic,1 (6.3%) desmoplastic. Molecular subgroup analysis showed 2 WNT (12.5%), 1 SHH (6.3%), 3 (18.8%) group 3 (G3) and 5 (31.2%) group 4 (G4). Four patients (25%) were classified as G3/G4 and 1 (6.3%) as mixed. Five patients (29.4%) were M2 and 12 patients (70.6%) were M3 according to Chang staging system. The location in the cerebellar hemispheres was only observed in SHH patient while G3 tumors presented homogeneous contrast enhancement. All WNT, G3 and G4 were located in IV ventricle. We found no association between molecular subgroup and metastatic site (intracranial vs spinal, Fisher test, p=0.45). All patients presented with metastasis in the third ventricular infundibular recess were G4. Four patients died, all of them were G3 or G3/G4. Our results supported the literature previously reported. According to the MRI imaging features, the molecular medulloblastoma subgroups could be suggested. The presence of metastasis in the infundibular recess suggested MB group 4. However, the dissemination pattern could not be associated with any subgroup in our series. Oxford University Press 2022-06-03 /pmc/articles/PMC9164653/ http://dx.doi.org/10.1093/neuonc/noac079.451 Text en © The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Neuro-Oncology. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
spellingShingle Medulloblastoma
Bellón, Marina Caballero
Moreno, Marta Pérez-Somarriba
Lavarino, Cinzia
Lopez, Vicente Santa-María
Martinez, Ofelia Cruz
Lopez, Jordi Muchart
La Madrid, Andrés Morales
MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern
title MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern
title_full MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern
title_fullStr MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern
title_full_unstemmed MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern
title_short MEDB-77. Metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern
title_sort medb-77. metastasic medulloblastoma: radiological features and its correlation with molecular subgroups and dissemination pattern
topic Medulloblastoma
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9164653/
http://dx.doi.org/10.1093/neuonc/noac079.451
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