Cited by 63Glioma Diagnosis and TreatmentAcute Myeloid Leukemia ResearchChromatin Remodeling and Cancer

Mitotic index, microvascular proliferation, and necrosis define 3 groups of 1p/19q codeleted anaplastic oligodendrogliomas associated with different genomic alterations

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Figarella-Branger, D., Mokhtari, K., Dehais, C., Jouvet, A., Uro-Coste, E., Colin, C., Carpentier, C., Forest, F. +71 more·2014·Neuro-Oncology

Abstract

BACKGROUND: The aim of this study was to correlate histological features and molecular characteristics in anaplastic oligodendrogliomas (AOs). METHODS: The histological characteristics of 203 AO patients, enrolled in the French national network POLA, were analyzed. The genomic profiles of 191 cases were studied using genomic arrays. IDH mutational status was assessed by immunohistochemistry and direct sequencing. RESULTS: 1p/19q codeletion was present in 79% of cases and was associated with alpha-internexin expression (P < 10(-4)), IDH1/2 mutation (P < 10(-4)), chromosome 4 loss (P < 10(-3)), and better overall survival (P < 10(-4)). Based on mitotic index, microvascular proliferation (MVP), and necrosis, 3 groups of 1p/19q codeleted AOs were identified: (group 1) AO with more than 5 mitoses per 10-HPF, no MVP, and no necrosis; (group 2) AO with MVP and no necrosis; and (group 3) AO with MVP and necrosis. Compared with group 1, groups 2 and 3 AOs had a higher mean Ki-67 proliferation index and a higher rate of 9p and 9q losses. Compared with group 2, group 3 AOs had a higher number of chromosomal alterations including chromosome 4 loss. In the subgroup of 157 1p/19q codeleted AOs, chromosomal instability was associated with shorter progression-free survival (P = .024) and shorter overall survival (P = .023). CONCLUSIONS: The present study shows that oligodendrogliomas with classic histological features remain a molecularly heterogeneous entity and should be stratified according to 1p/19q status because of its major prognostic relevance. Moreover, 1p/19q codeleted AOs are also heterogeneous. Interestingly, mitotic index, MVP, and necrosis help to classify them into 3 groups associated with distinct genomic alterations.

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  • These grading criteria are subject to inter-rater variability, and the reliability of these benchmarks as a predictor of patient outcome has been called into question.

    “These criteria are subject to inter-rater variability, and accordingly, the reliability of these benchmarks as a predictor of patient outcome have been called into question [7,12,13,14].”

    From BPC 157 Therapy of Myotendinous Junction Injury in Rats (2025) · cites this paper as [12]

    The paper says histological classification can depend on how a pathologist classifies the tumor, with necrosis then changing its grade (section labeled Abstract; page unavailable). It also says necrosis’s prognostic significance is controversial and cautions in the Discussion that short follow-up prevents definitive prognostic conclusions. It does not directly assess inter-rater variability or establish that such variability is why the grading criteria’s outcome prediction is questioned. (LLM, conf=0.84)

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Authors
Figarella-Branger, D., Mokhtari, K., Dehais, C., Jouvet, A., Uro-Coste, E., Colin, C., Carpentier, C., Forest, F., Maurage, C.-A., Vignaud, J.-M., Polivka, M., Lechapt-Zalcman, E., Eimer, S., Viennet, G., Quintin-Roue, I., Aubriot-Lorton, M.-H., Diebold, M.-D., Loussouarn, D., Lacroix, C., Rigau, V., Laquerriere, A., Vandenbos, F., Michalak, S., Sevestre, H., Peoch, M., Labrousse, F., Christov, C., Kemeny, J.-L., Chenard, M.-P., Chiforeanu, D., Ducray, F., Idbaih, A., Desenclos, C., Menei, P., Al Nader, E., Godard, J., Servagi-Vernat, S., Carpentier, A., Loiseau, H., Dam-Hieu, P., Guillamo, J. S., Emery, E., Verelle, P., Durando, X., Faillot, T., Le Guerinel, C., Ghiringhelli, F., Parker, F., Adam, C., Dubois, F., Ramirez, C., Gueye, E. M., Honnorat, J., Chinot, O., Bauchet, L., Beauchesne, P., Campone, M., Frenel, J. S., Fontaine, D., Campello, C., Roger, P., Heitzmann, A., Fesneau, M., Delattre, J. Y., Elouadhani-Hamdi, S., Ricard, D., Colin, P., Vauleon, E., Langlois, O., Fotso, M. J. M., Andraud, M., Mouton, S., Noel, G., Desse, N., Soulard, R., Cohen-Moyal, E., Lubrano, V., Dhermain, F., & the POLA Network
Affiliations
  • Inserm (FR)
  • Centre de Recherche en Neurosciences de Lyon (FR)
  • Centre Hospitalier Universitaire Henri-Mondor (FR)
  • Centre Hospitalier Universitaire de Clermont-Ferrand (FR)
  • Centre Hospitalier Universitaire de Rennes (FR)
  • Hôpitaux Universitaires de Strasbourg (FR)
  • Aix-Marseille Université (FR)
Venue
Neuro-Oncology
Published
2014-04-09
Volume
16
Issue
9
Pages
1244-1254
ISSN
  • 1522-8517 (ISSN-L)
  • 1523-5866
OpenAlex
W2161476194
Cited by
63
References
27
Citations by year
2026: 2 · 2025: 7 · 2024: 5 · 2023: 7 · 2022: 7 · 2021: 4 · 2020: 3 · 2019: 4 · 2018: 4 · 2017: 2 · 2016: 8 · 2015: 7 · 2014: 3
FWCI
3.34
Type
journal article
Language
en
Open access
Locations
  • Neuro-Oncology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • Institut National de la Santé et de la Recherche Médicale (INCa-DGOS-Inserm 6038)
  • Centre Hospitalier Régional Universitaire de Montpellier
  • Institut National Du Cancer (INCa-DGOS-INSERM-6038)
  • Direction Générale de l’offre de Soins
Topics
  • Health Sciences › Medicine › Genetics › Glioma Diagnosis and Treatment
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
anaplastic oligodendroglioma, 1p/19q codeletion, mitotic index, microvascular proliferation, necrosis, histological heterogeneity, IDH mutation, alpha-internexin, chromosomal instability, Ki-67 proliferation index, prognostic stratification, overall survival, progression-free survival
MeSH terms
Brain, Brain Neoplasms, Chromosome Deletion, Chromosomes, Human, Pair 1, Chromosomes, Human, Pair 19, Humans, Isocitrate Dehydrogenase, Mitotic Index, Necrosis, Neovascularization, Pathologic, Oligodendroglioma, Disease-Free Survival

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