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FIG 2. 78-year-old man with a recurrent glioblastoma. The diagnosis was determined by the progressively enlarging area of enhancement on serial MR images and by the patient's clinical deterioration.
A, Contrast-enhanced T1-weighted MR image (690/14/1; section thickness, 5 mm) shows inhomogeneous enhancement (arrows) with surrounding nonenhancing zone of low intensity and mass effect in the right temporoparietal lobe.
B, The recurrent tumor is seen as an area of hypovascularity (arrows) on the rCBV map (normalized rCBV ratio, 0.83).
C, 201Tl-SPECT scans show abnormal uptake in the area of recurrent tumor (arrow), consistent with tumor recurrence.
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