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Published in: Journal of Neuro-Oncology 1/2012

01-05-2012 | Laboratory Investigation

1P19Q loss but not IDH1 mutations influences WHO grade II gliomas spontaneous growth

Authors: Catherine Gozé, Charlotte Bezzina, Eric Gozé, Valérie Rigau, Thierry Maudelonde, Luc Bauchet, Hugues Duffau

Published in: Journal of Neuro-Oncology | Issue 1/2012

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Abstract

Mutations at the codon 132 in the isocitrate dehydrogenase 1 (IDH1) gene occur early, with a high frequency, in World Health Organization (WHO) grade II gliomas. We investigated the impact of IDH1 mutations on spontaneous glioma growth rate, known to be an early prognostic factor.The mean tumor diameter was assessed on the first MRI performed at diagnosis and on a second MRI, performed immediately before surgery, in a series of 64 WHO grade II gliomas. The patients did not undergo treatment before surgery. Because of a frequent association, we jointly analyzed the 1p19q co-deletion and IDH1 mutations effects on tumor velocity of diameter expansion (mm/year) during preoperative spontaneous growth period. 1p19q co-deletion had a significant slowing effect (p = 0.0133) on tumor growth estimated at −1.7760 ± 0.711 mm/year (95% CI −3.154, −0.366), whereas IDH1 mutations estimated effect of +0.036 ± 0.833 mm/year (95% CI −1.668; +1.596) was not significant (p = 0.9654). Our results provide first evidence that IDH1 mutations are not significantly involved in tumor growth rate. By contrast, we confirm that 1p19q co-deletion decreases growth velocity.
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Metadata
Title
1P19Q loss but not IDH1 mutations influences WHO grade II gliomas spontaneous growth
Authors
Catherine Gozé
Charlotte Bezzina
Eric Gozé
Valérie Rigau
Thierry Maudelonde
Luc Bauchet
Hugues Duffau
Publication date
01-05-2012
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 1/2012
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-012-0831-6

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