Article Figures & Data
Figures
- Fig 1.
Three different cases of chordoid meningioma show the characteristic T1, T2 FLAIR, and postcontrast T1 appearances, which are similar to those of other meningioma subtypes. A, T2-weighted FLAIR image shows slight hyperintensity to gray matter with mild surrounding edema. B, T1-weighted image shows isointensity of the chordoid meningioma (arrow) to gray matter. C, Contrast-enhanced T1-weighted image shows avid homogeneous enhancement of the meningioma.
- Fig 2.
Chordoid meningioma shows facilitated diffusion. A, Postcontrast T1-weighted image showing avid homogeneous enhancement of a left temporal chordoid meningioma. B, DWI shows hypointensity of this chordoid meningioma. C, ADC map corresponding to the tumor shown in B depicting hyperintensity of the meningioma with an ADC value of 2.11 and an NADC ratio of 2.93, which represent increased diffusion. D, Postcontrast T1-weighted image of a different patient shows avid homogeneous enhancement of a left frontal convexity chordoid meningioma. E, DWI of this tumor shows isointensity to slight hypointensity of the tumor. F, ADC map corresponding to tumor shown in E shows increased signal of the meningioma with an ADC value of 1.47 and an NADC ratio of 1.99, which are consistent with facilitated diffusion.
- Fig 3.
Boxplot of the ADC values of all WHO grade I, II, and III meningiomas shows that chordoid meningiomas have significantly higher ADC values than all other subtypes, and there is a clear gap between the lowest chordoid meningioma ADC and the highest ADC from all other subtypes.
- Fig 4.
Boxplot of the NADC ratios of all WHO grade I, II, and III meningiomas shows that chordoid meningioma tumors have significantly higher NADC ratios than all other subtypes, and there is a clear gap between the lowest chordoid meningioma NADC ratio and the highest NADC ratio from all other types.
