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FIG 4. 49-year-old man without tumor recurrence. The diagnosis was based on the decreasing size of the enhanced area on serial MR images.
A, Contrast-enhanced T1-weighted MR image (690/14/1; section thickness, 5 mm) shows a small focus of enhancement (arrow) within surrounding nonenhancing zone of low intensity and mass effect in the left frontal lobe.
B, Enhanced area appears as a region of hypervascularity (arrows) on the rCBV map (normalized rCBV ratio, 1.79).
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