Table 1.
Characteristics of the study groups.
Fig 1.
Left, Spectrum of meningioma, WHO, grade 1; Middle, Spectrum of meningioma, WHO, grade 2; Right, Spectrum of meningioma, WHO, grade 3. Cho, choline; Cr, creatine; NAA, N-acetylaspartate.
Fig 2.
Conditional inference tree revealing that the optimal cut-off point to distinguish high-grade meningioma from low-grade meningioma was 2.409 (OR = 10.133).
Among 13 high-grade meningiomas, eight exhibited a Cho/NAA ratio of >2.409, sensitivity = 61.54%; among 22 low-grade meningiomas, 19 exhibited a Cho/NAA ratio of ≤2.409, specificity = 86.36%. For this cut-off value, the positive predictive value (PPV) was 72.7%, whereas the negative predictive value (NPV) was 79.2%. Cho, choline; Cr, creatine; NAA, N-acetylaspartate.
Table 2.
Proton magnetic resonance spectroscopy (1H-MRS)-detected metabolite ratios in intracranial meningioma.
Table 3.
Univariate analysis of potential predictors for high-grade meningioma.