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FIG 5. 20-year-old woman without tumor recurrence. The diagnosis was based on the disappearance of the enhancing 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 (arrows) within surrounding nonenhancing zone of low intensity and mass effect in the left frontal lobe.
B, The enhancing area appears mildly hypervascular (arrows) on the rCBV map (normalized rCBV ratio, 1.17). The effects of previous surgery can be seen as susceptibility artifacts in right frontal region (arrowheads).
C, 201Tl-SPECT scan shows no abnormal uptake in the enhancing lesion (arrows), consistent with lack of tumor recurrence.
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