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A 53-year-old man with grade II oligodendroglioma. A) There is no contrast enhancement on the contrast-enhanced axial T1-weighted image. B) DSC-PWI with rCBV color overlay map shows increased perfusion with a high rCBV of 3.34, in keeping with a high-grade glioma. C) 1HMRS demonstrates a Cho/Cr ratio of 1.3, in keeping with a low-grade glioma.
