Diagnostic performance of edited 2HG MR spectroscopy of central glioma in the clinical environment
- 05.01.2022
- Research Article
Erschienen in:
- Verfasst von
- Dominik Juskanič
- Jana Poláková Mištinová
- Samuel Hollý
- Monika Sekerešová
- Kamil Koleják
- Lukáš Pátrovič
Abstract
Objective
Oncometabolite D-2-hydroxyglutarate (2HG) is pooled in isocitrate dehydrogenase (IDH)-mutant glioma cells. Detecting 2HG by MR spectroscopy (MRS) has been proven viable in the last decade but has not entirely found its way into the clinical routine. This study aimed to explore the adoption of 2HG MRS while acknowledging factors that influence its performance in the clinical environment.
Methods
Thirty-nine MR spectra were acquired and reported prospectively in patients with suspected glioma using a 3 T system with Mescher–Garwood point-resolved spectroscopy (MEGA-PRESS) sequence utilizing averaged free induction decay (FID) signals. Postprocessing and evaluation of spectra were performed with jMRUI and LCModel. 2HG concentration estimates, 2HG/Cr ratio, together with quality measures, including Cramér–Rao lower bounds (CRLBs), full-width at half-maximum (FWHM) values, and signal-to-noise ratio (SNR) were calculated using LCModel. Immunohistochemistry and genomic analysis results used as a ground truth were available for 15 patients.
Results
The threshold for test positivity was set according to the ROC curve at 1 mM. Calculated sensitivity was 57.14% (95% CI 0.20–0.88), specificity 87.5% (95% CI 0.46–0.99), positive predictive value 80%, and negative predictive value 70%. Overall diagnostic accuracy was 73.33% (95% CI 0.45–0.92). The 2HG/Cr ratio with the cutoff value 0.085 significantly improved sensitivity and overall diagnostic accuracy [85.71%, 95% CI 0.42–1.00 and 86.67%, (95% CI 0.60–0.98), respectively].
Conclusion
Multiple factors compromising spectral quality in the clinical adoption of edited 2HG MRS resulted in diminished sensitivity but clinically acceptable specificity. Furthermore, the 2HG/Cr ratio performs better than the sole 2HG concentration estimate in the pre-operative setting.
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- Titel
- Diagnostic performance of edited 2HG MR spectroscopy of central glioma in the clinical environment
- Verfasst von
-
Dominik Juskanič
Jana Poláková Mištinová
Samuel Hollý
Monika Sekerešová
Kamil Koleják
Lukáš Pátrovič
- Publikationsdatum
- 05.01.2022
- Verlag
- Springer International Publishing
- Erschienen in
-
Magnetic Resonance Materials in Physics, Biology and Medicine / Ausgabe 1/2022
Print ISSN: 0968-5243
Elektronische ISSN: 1352-8661 - DOI
- https://doi.org/10.1007/s10334-021-00989-y
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