Images of a 52-year-old woman with a histologically confirmed grade II/IV glioma (A−C) and a 70-year-old woman with a histologically confirmed grade III/IV.

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High-signal-intensity lesions on T2-weighted MR images

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Presentation transcript:

Images of a 52-year-old woman with a histologically confirmed grade II/IV glioma (A−C) and a 70-year-old woman with a histologically confirmed grade III/IV glioma (D−F).A, Contrast-enhanced axial view T1-weighted image shows a lesion in the right temporopar... Images of a 52-year-old woman with a histologically confirmed grade II/IV glioma (A−C) and a 70-year-old woman with a histologically confirmed grade III/IV glioma (D−F).A, Contrast-enhanced axial view T1-weighted image shows a lesion in the right temporoparietal region with low signal intensity and minimal enhancement.B, Axial view T2-weighted image shows increase in T2 signal intensity within the lesion, with minimal edema.C, Gradient-echo axial view perfusion MR image and rCBV color overlay map show a low rCBV of 1.70, in keeping with a low grade glioma. A thin rim of minimally increased perfusion can be seen at the margin of the lesion. This is compared with the increased rCBV of PNETs shown in Figures 1C and 2C.D, Contrast-enhanced axial view T1-weighted image shows a lesion in the right thalamic region with heterogeneous peripheral contrast enhancement and a central cystic/necrotic region.E, Axial view T2-weighted image shows increase in T2 signal intensity within the lesion with moderate surrounding edema. The patient also has hydrocephalus and transependymal edema around the ventricles.F, Gradient-echo axial view perfusion MR image and rCBV color overlay map show a high rCBV of 3.70, in keeping with a high grade glioma. A thick rind of marked increased perfusion cannot be readily differentiated from the increased rCBV of PNETs shown in Figures 1C and 2C. Meng Law et al. AJNR Am J Neuroradiol 2004;25:997-1005 ©2004 by American Society of Neuroradiology