Isocitrate dehydrogenase (IDH) mutations can be identified by gas chromatography mass spectrometry (GC/MS). The sensitivity and specificity are 100% in gliomas for the accumulation of 2-hydroxyglutarate (2-HG), whereas the ratio of 2-HG/glutamic acid also serves as a reliable index. The modified mini-column GC/MS method could shorten the procedure to 40 min for rapid diagnosis.
