Classification and controversies in pathology of ependymomas.

Godfraind, Catherine
(2009) Child’s Nervous System — Vol. 25, n° 10, p. 1185-1193 (2009)

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  • Godfraind, CatherineUCLouvain
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Abstract
PURPOSE: Bailey and Cushing established ependymoma as a brain tumour entity in the first brain tumour classification (1926). Diagnosis of ependymomas is not subject to controversy as long as other tumours presenting ependymoma-like features have been ruled out. Grading conversely is a source of debate. Description of histological features establishing diagnosis and grading of ependymomas may help to better understand this controversy. METHODS: Literature has been reviewed using PubMed with the following key words: ependymoma, +/- prognosis, +/- biomaker, +/- grading, +/- immunohistochemistry, +/- proliferative index. RESULTS: Grading controversy arises from elusive WHO features and individual characteristics of ependymomas including tumour location, tumour pattern/variant and variable expression of biomarkers. CONCLUSION: There is a need for a grading scheme with a proven general ability to dissociate grades, and to predict individual clinical evolution. Only then will stratified and targeted therapeutics for ependymal tumours be possible.
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Godfraind, C. (2009). Classification and controversies in pathology of ependymomas. Child’s Nervous System, 25(10), 1185-1193. https://doi.org/10.1007/s00381-008-0804-4 (Original work published 2009)