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. 2026 Feb 9;44(2):340-354.e2.
doi: 10.1016/j.ccell.2025.11.002. Epub 2025 Dec 4.

Advancing CNS tumor diagnostics with expanded DNA methylation-based classification

Martin Sill  1 Daniel Schrimpf  2 Areeba Patel  3 Dominik Sturm  4 Natalie Jäger  5 Philipp Sievers  2 Leonille Schweizer  6 Rouzbeh Banan  2 David Reuss  2 Abigail Suwala  2 Andrey Korshunov  2 Damian Stichel  2 Annika K Wefers  7 Ann-Christin Hau  8 Henning Boldt  9 Patrick N Harter  10 Zied Abdullaev  11 Jamal Benhamida  12 Daniel Teichmann  13 Arend Koch  13 Jürgen Hench  14 Stephan Frank  14 Martin Hasselblatt  15 Sheila Mansouri  16 Theresita Díaz de Ståhl  17 Jonathan Serrano  18 Jonas Ecker  19 Florian Selt  20 Michael Taylor  21 Vijay Ramaswamy  22 Florence Cavalli  23 Anna S Berghoff  24 Brigitte Bison  25 Mirjam Blattner-Johnson  26 Ivo Buchhalter  27 Rolf Buslei  28 Gabriele Calaminus  29 Nicola Dikow  30 Hildegard Dohmen  31 Philipp Euskirchen  13 Gudrun Fleischhack  32 Amar Gajjar  33 Nicolas U Gerber  34 Marco Gessi  35 Gerrit H Gielen  36 Astrid Gnekow  37 Nicholas G Gottardo  38 Christine Haberler  39 Stefan Hamelmann  2 Volkmar Hans  40 Jordan R Hansford  41 Christian Hartmann  42 Frank L Heppner  43 Pablo Hernaiz Driever  44 Katja von Hoff  45 Ulrich W Thomale  46 Stephan Tippelt  32 Michael C Frühwald  47 Christof M Kramm  48 Ulrich Schüller  49 Jens Schittenhelm  50 Martin U Schuhmann  51 Marco Stein  52 Petra Ketteler  53 Marc Ladanyi  12 Nada Jabado  54 Barbara C Jones  55 Chris Jones  56 Matthias A Karajannis  57 Ralf Ketter  58 Patricia Kohlhof  59 Uwe Kordes  60 Annekathrin Reinhardt  2 Christian Kölsche  61 Katrin Lamszus  62 Peter Lichter  63 Sybren L N Maas  64 Christian Mawrin  65 Till Milde  66 Michel Mittelbronn  67 Camelia-Maria Monoranu  68 Wolf Mueller  69 Martin Mynarek  70 Paul A Northcott  71 Kristian W Pajtler  72 Werner Paulus  15 Arie Perry  73 Ingmar Blümcke  74 Karl H Plate  6 Michael Platten  75 Matthias Preusser  24 Torsten Pietsch  76 Marco Prinz  77 Guido Reifenberger  78 Bjarne W Kristensen  79 Marcel Kool  80 Volker Hovestadt  81 David W Ellison  82 Thomas S Jacques  83 Pascale Varlet  84 Nima Etminan  85 Till Acker  31 Michael Weller  86 Christine L White  87 Olaf Witt  20 Christel Herold-Mende  88 Jürgen Debus  89 Sandro Krieg  90 Wolfgang Wick  91 Matija Snuderl  18 Ken Aldape  11 Sebastian Brandner  92 Cynthia Hawkins  93 Craig Horbinski  94 Christian Thomas  15 Pieter Wesseling  95 Andreas von Deimling  2 David Capper  13 Stefan M Pfister  96 David T W Jones  97 Felix Sahm  98
Affiliations
Free article

Advancing CNS tumor diagnostics with expanded DNA methylation-based classification

Martin Sill et al. Cancer Cell. .
Free article

Abstract

DNA methylation-based classification is now central to contemporary neuro-oncology, as highlighted by the World Health Organization (WHO) classification of central nervous system (CNS) tumors. We present the Heidelberg CNS Tumor Methylation Classifier version 12.8 (v12.8), trained on 7,495 methylation profiles, which expands recognized entities from 91 classes in version 11 (v11) to 184 subclasses. This expansion is a result of newly identified tumor types discovered through our large online repository and global collaborations, underscoring CNS tumor heterogeneity. The random forest-based classifier achieves 95% subclass-level accuracy, with its well-calibrated probabilistic scores providing a reliable measure of confidence for each classification. Its hierarchical output structure enables interpretation across subclass, class, family, and superfamily levels, thereby supporting clinical decisions at multiple granularities. Comparative analyses demonstrate that v12.8 surpasses previous versions and conventional WHO-based approaches. These advances highlight the improved precision and practical utility of the updated classifier in personalized neuro-oncology.

Keywords: CNS tumors; DNA methylation; MLOps; artificial intelligence; classification; epigenetics; machine learning; molecular diagnostics; precision medicine; tumor heterogeneity.

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Conflict of interest statement

Declaration of interests M. Sill, D.S., M. Snuderl, A.v.D., S.M.P., D.C., D.T.W.J., and F.S. are co-founders and shareholders of Heidelberg Epignostix GmbH, a company that develops and commercializes DNA methylation-based classifiers for CNS and other tumors, including the Heidelberg CNS Classifier described in this manuscript. M. Sill and N.J. became full-time employees of Heidelberg Epignostix in July 2024, A.P. in December 2024, and D.S. became a part-time employee in November 2024. M. Sill, A.v.D., D.S., D.T.W.J., D.C., V.H., and S.M.P. report patent EP16710700.2 and EP4384959A2. These patents cover the intellectual property for the DNA methylation-based CNS tumor classification method, which is the specific technology described and advanced in this manuscript. M.A.K. was funded in part through the NIH/NCI Cancer Center Support Grant P30 CA008748 to Memorial Sloan Kettering Cancer Center. G.F. and S.T. were funded by the DKS2020.02 research grant for HIT-REZ-Registry, German Childhood Cancer Foundation. M.W. has received research grants from Novartis, Quercis, and Versameb, and honoraria for lectures, advisory boards, or consulting from Anheart, Bayer, Curevac, Medac, Neurosense, Novartis, Novocure, Orbus, Pfizer, Philogen, Roche, and Servier. M. Snuderl is supported by NINDS grant R01-NS122987 and is scientific advisor/shareholder of Halo Dx, and advisor to Arima Genomics and InnoSIGN, and has received research funding from Lilly USA. The German HIT-LOGGIC-Registry was supported by the Deutsche Kinderkrebsstiftung (DKKS 2019.06, 2021.03, and 2023.08). The protocol was approved by the IRB (EA2/030/19). P.H.D. is member of the Alexion Advisory Board on behalf of Charité-Universitätsmedizin Berlin. M.P. has received honoraria for lectures, consultation, or advisory board participation from Bayer, Bristol-Myers Squibb, Novartis, GLG, CMC Contrast, GlaxoSmithKline, Mundipharma, Roche, BMJ Journals, MedMedia, AstraZeneca, AbbVie, Lilly, Medahead, Daiichi Sankyo, Sanofi, Merck Sharp & Dohme, Tocagen, Adastra, Gan & Lee Pharmaceuticals, Janssen, Servier, Miltenyi, Boehringer-Ingelheim, Telix, Medscape, OncLive, Medac, Nerviano Medical Sciences, and ITM Oncologics GmbH. A.S.B. has research support from Daiichi Sankyo and Roche, and honoraria from Roche, Bristol-Myers Squibb, Merck, Daiichi Sankyo, AstraZeneca, CeCaVa, Seagen, Alexion, and Servier, as well as travel support from Roche, Amgen, and AbbVie.

Update of

  • Advancing CNS tumor diagnostics with expanded DNA methylation-based classification.
    Sill M, Schrimpf D, Patel A, Sturm D, Jäger N, Sievers P, Schweizer L, Banan R, Reuss D, Suwala A, Korshunov A, Stichel D, Wefers AK, Hau AC, Boldt H, Harter PN, Abdullaev Z, Benhamida J, Teichmann D, Koch A, Hench J, Frank S, Hasselblatt M, Mansouri S, Díaz de Ståhl T, Serrano J, Ecker J, Selt F, Taylor M, Ramaswamy V, Cavalli F, Berghoff AS, Bison B, Blattner-Johnson M, Buchhalter I, Buslei R, Calaminus G, Dikow N, Dohmen H, Euskirchen P, Fleischhack G, Gajjar A, Gerber NU, Gessi M, Gielen GH, Gnekow A, Gottardo NG, Haberler C, Hamelmann S, Hans V, Hansford JR, Hartmann C, Heppner FL, Driever PH, von Hoff K, Thomale UW, Tippelt S, Frühwald MC, Kramm CM, Schüller U, Schittenhelm J, Schuhmann MU, Stein M, Ketteler P, Ladanyi M, Jabado N, Jones BC, Jones C, Karajannis MA, Ketter R, Kohlhof P, Kordes U, Reinhardt A, Kölsche C, Lamszus K, Lichter P, Maas SLN, Mawrin C, Milde T, Mittelbronn M, Monoranu CM, Mueller W, Mynarek M, Northcott PA, Pajtler KW, Paulus W, Perry A, Blümcke I, Plate KH, Platten M, Preusser M, Pietsch T, Prinz M, Reifenberger G, Kristensen BW, Kool M, Hovestadt V, Ellison DW, Jacques TS, Varlet P, Etminan N, Acker T, Weller M, White CL, Witt O, Herold-Mende C, De… See abstract for full author list ➔ Sill M, et al. medRxiv [Preprint]. 2025 May 29:2025.05.28.25328344. doi: 10.1101/2025.05.28.25328344. medRxiv. 2025. Update in: Cancer Cell. 2026 Feb 9;44(2):340-354.e2. doi: 10.1016/j.ccell.2025.11.002. PMID: 40492071 Free PMC article. Updated. Preprint.
  • Advancing sarcoma diagnostics with expanded DNA methylation-based classification.
    Jäger N, Reuss DE, Sill M, Schrimpf D, Suwala AK, Sievers P, Banan R, Hinz F, Rahmanzade R, Bogumil H, Aras KF, Patel A, Korshunov A, Bewerunge-Hudler M, Cleven AH, Esteller M, Glimm H, Hartmann W, Kreutzfeld S, Heilig C, Milde T, Petersen I, Vokuhl CM, Wick W, Witt O, Kervarrec T, Miele E, Serrano J, Frank S, Kashofer K, Leer AM, Pfaff E, Pages M, Tauziede-Espariat A, Toberer F, Boldt HB, Martinek P, Brandner S, Euzebio M, Siegfried A, Chalker J, Harter P, Appay R, Dietmaier W, Hasselblatt M, Flucke UE, Hiemcke-Jiwa LS, Solomon D, Frydrychowicz C, Varlet P, Goeppert B, Nathrath M, Blattmann C, Sparber-Sauer M, Kolb A, Mittelbronn M, Mentzel T, Leisz S, Harder A, Acker T, Pratt D, Wardelmann E, Benhamida J, Ladanyi M, Jurmeister P, Foulkes W, Ajuyah P, Ziegler DZ, Hench J, Nederkoorn MJ, Versleijen-Jonkers YM, Mechtersheimer G, Krieg S, Gessler M, Baumhoer D, Behjati S, Bertero L, Griwank K, Schadendorf D, Hogendoorn PC, Emile JF, Kemps PG, Jarosch A, Ronellenfitsch MW, Idler TS, Aust D, Herold S, Pablik J, Al-Hussaini M, Abdullaev Z, Yeung M, Wachtel M, Brack E, Kommoss FK, Miettinen M, Aldape K, Flanagan AM, Dirksen U, Pajtler K, Grünewald TG, Lipka D, Fröhling S, Koelsche C, Sn… See abstract for full author list ➔ Jäger N, et al. medRxiv [Preprint]. 2025 Jun 30:2025.06.30.25330543. doi: 10.1101/2025.06.30.25330543. medRxiv. 2025. Update in: Cancer Cell. 2026 Feb 9;44(2):340-354.e2. doi: 10.1016/j.ccell.2025.11.002. PMID: 40630595 Free PMC article. Updated. Preprint.

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