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A 37-year-old man with grade III anaplastic oligodendroglioma. A) There is no contrast enhancement on the contrast-enhanced axial T1-weighted image. B) DSC-PWI with rCBV color overlay map shows low perfusion with a rCBV of 0.73, in keeping with a low-grade glioma. C) 1HMRS demonstrates a Cho/Cr ratio of 1.55, in keeping with a high-grade glioma.
