Isocitrate dehydrogenase mutation is associated with tumor location and magnetic resonance imaging characteristics in astrocytic neoplasms

  • Authors:
    • Songtao Qi
    • Lei Yu
    • Hezhen Li
    • Yanghui Ou
    • Xiaoyu Qiu
    • Yanqing Ding
    • Huixia Han
    • Xuelin Zhang
  • View Affiliations

  • Published online on: March 28, 2014     https://doi.org/10.3892/ol.2014.2013
  • Pages: 1895-1902
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Abstract

The molecular subsets of glioma behave in biologically distinct ways. The present study detected isocitrate dehydrogenase (IDH) 1 and IDH2 mutations in glioma to analyze whether IDH‑mutated gliomas are situated in certain preferential areas and to investigate their correlation with magnetic resonance imaging (MRI) characteristics. A series of 193 patients with astrocytic neoplasms (111 diffuse and 82 anaplastic astrocytomas), grouped according to prelabeled anatomical structures and the risk of surgery, were retrospectively reviewed for IDH1 and IDH2 mutations to compare the tumor location and MRI features. A total of 111 IDH1 mutations at codon 132 (57.5%) and six IDH2 mutations at codon 172 (3.1%) were detected. The IDH1/2 mutations were found to predict longer survival, independent of the histological type in this series of patients. The IDH‑mutated gliomas were predominantly located in a single lobe, such as the frontal lobe, temporal lobe or cerebellum and rarely in the diencephalon or brain stem. Furthermore, according to the risk of surgery, the IDH‑mutated tumors were rarely located in the high‑risk regions of the brain, where surgery exhibits a high mortality rate intraoperatively and postoperatively. In addition, gliomas with IDH mutations were significantly more likely to exhibit a unilateral pattern of growth, sharp tumor margins, homogeneous signal intensity and less contrast enhancement on MRI. The results of the current study suggested that the prolonged survival of patients with IDH‑mutated gliomas is primarily due to a less aggressive biological behavior according to tumor site and MRI features.
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June 2014
Volume 7 Issue 6

Print ISSN: 1792-1074
Online ISSN:1792-1082

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APA
Qi, S., Yu, L., Li, H., Ou, Y., Qiu, X., Ding, Y. ... Zhang, X. (2014). Isocitrate dehydrogenase mutation is associated with tumor location and magnetic resonance imaging characteristics in astrocytic neoplasms. Oncology Letters, 7, 1895-1902. https://doi.org/10.3892/ol.2014.2013
MLA
Qi, S., Yu, L., Li, H., Ou, Y., Qiu, X., Ding, Y., Han, H., Zhang, X."Isocitrate dehydrogenase mutation is associated with tumor location and magnetic resonance imaging characteristics in astrocytic neoplasms". Oncology Letters 7.6 (2014): 1895-1902.
Chicago
Qi, S., Yu, L., Li, H., Ou, Y., Qiu, X., Ding, Y., Han, H., Zhang, X."Isocitrate dehydrogenase mutation is associated with tumor location and magnetic resonance imaging characteristics in astrocytic neoplasms". Oncology Letters 7, no. 6 (2014): 1895-1902. https://doi.org/10.3892/ol.2014.2013