Gliomatosis cerebri in children: a poor prognostic phenotype of diffuse gliomas with a distinct molecular profile

The term gliomatosis cerebri (GC), a radiology-defined highly infiltrating diffuse glioma, has been abandoned since molecular GC-associated features could not be established.We conducted a multinational retrospective study of 104 children and adolescents with GC providing comprehensive clinical and...

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Main Authors: Nussbaumer, Gunther (Author) , Blattner-Johnson, Mirjam (Author) , Pfister, Stefan (Author) , Sturm, Dominik (Author) , Jones, David T. W. (Author)
Format: Article (Journal)
Language:English
Published: September 2024
In: Neuro-Oncology
Year: 2024, Volume: 26, Issue: 9, Pages: 1723-1737
ISSN:1523-5866
DOI:10.1093/neuonc/noae080
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/neuonc/noae080
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Author Notes:Gunther Nussbaumer, Martin Benesch, Yura Grabovska, Alan Mackay, David Castel, Jacques Grill, Marta M Alonso, Manila Antonelli, Simon Bailey, Joshua N Baugh, Veronica Biassoni, Mirjam Blattner-Johnson, Alberto Broniscer, Andrea Carai, Giovanna Stefania Colafati, Niclas Colditz, Selim Corbacioglu, Shauna Crampsie, Natacha Entz-Werle, Matthias Eyrich, Lea L Friker, Michael C Frühwald, Maria Luisa Garrè, Nicolas U Gerber, Felice Giangaspero, Maria J Gil-da-Costa, Norbert Graf, Darren Hargrave, Peter Hauser, Ulrich Herrlinger, Marion Hoffmann, Esther Hulleman, Elisa Izquierdo, Sandra Jacobs, Michael Karremann, Antonis Kattamis, Rejin Kebudi, Rolf-Dieter Kortmann, Robert Kwiecien, Maura Massimino, Angela Mastronuzzi, Evelina Miele, Giovanni Morana, Claudia M Noack, Virve Pentikainen, Thomas Perwein, Stefan M Pfister, Torsten Pietsch, Kleoniki Roka, Sabrina Rossi, Stefan Rutkowski, Elisabetta Schiavello, Clemens Seidel, Jaroslav Štěrba, Dominik Sturm, David Sumerauer, Anna Tacke, Sara Temelso, Chiara Valentini, Dannis van Vuurden, Pascale Varlet, Sophie E M Veldhuijzen van Zanten, Maria Vinci, André O von Bueren, Monika Warmuth-Metz, Pieter Wesseling, Maria Wiese, Johannes E A Wolff, Josef Zamecnik, Andrés Morales La Madrid, Brigitte Bison, Gerrit H Gielen, David T W Jones, Chris Jones, Christof M Kramm

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520 |a The term gliomatosis cerebri (GC), a radiology-defined highly infiltrating diffuse glioma, has been abandoned since molecular GC-associated features could not be established.We conducted a multinational retrospective study of 104 children and adolescents with GC providing comprehensive clinical and (epi-)genetic characterization.Median overall survival (OS) was 15.5 months (interquartile range, 10.9-27.7) with a 2-year survival rate of 28%. Histopathological grading correlated significantly with median OS: CNS WHO grade II: 47.8 months (25.2-55.7); grade III: 15.9 months (11.4-26.3); grade IV: 10.4 months (8.8-14.4). By DNA methylation profiling (n = 49), most tumors were classified as pediatric-type diffuse high-grade glioma (pedHGG), H3-/IDH-wild-type (n = 31/49, 63.3%) with enriched subclasses pedHGG_RTK2 (n = 19), pedHGG_A/B (n = 6), and pedHGG_MYCN (n = 5), but only one pedHGG_RTK1 case. Within the pedHGG, H3-/IDH-wild-type subgroup, recurrent alterations in EGFR (n = 10) and BCOR (n = 9) were identified. Additionally, we observed structural aberrations in chromosome 6 in 16/49 tumors (32.7%) across tumor types. In the pedHGG, H3-/IDH-wild-type subgroup TP53 alterations had a significant negative effect on OS.Contrary to previous studies, our representative pediatric GC study provides evidence that GC has a strong predilection to arise on the background of specific molecular features (especially pedHGG_RTK2, pedHGG_A/B, EGFR and BCOR mutations, chromosome 6 rearrangements). 
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