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FIG 3. Transitional cell carcinoma of the urinary bladder with calvarial metastases and meningeal extension.
A, Contrast-enhanced FLAIR image shows localized mild pachymeningeal enhancement (arrows) adjacent to the focal destructive lesion of the right parietooccipital bone. The hyperintensity of adjacent white matter edema is clearer on contrast-enhanced FLAIR image. Note that the internal cerebral veins and cortical veins do not enhance on the FLAIR image. Similarly, the hypervascular pachymeninges (arrows) with increased blood pool does not enhance nearly as much as on the T1-weighted image in panel B.
B, The pachymeningeal enhancement is more apparent and appears thicker on a contrast-enhanced T1-weighted image with FS (arrow). The enhancing cortex is distinct from the underlying hypointense edema.
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