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| Pachymeningitis. Extensive
posterior fossa dural and meningeal enhancement with
extension into the bilateral internal auditory canals
(arrows). +C = contrast enhanced.
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| In the RGB+C image, chronic
small vessel ischemic white matter disease is depicted in green-blue,
reflecting increased T2 (blue) and FLAIR (green) signal, with minimal T1 (red)
contribution. The abnormally thickened and contrast-enhanced dura
is white.
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| Note the abnormally thick and enhancing dura toward the
convexities.
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| Color-encoded MR images of 66-year-old man with persistent headaches. Chronic extensive thickening and enhancement
of the meninges in supra- and infratentorial regions are
consistent with pachymeningitis. Additional
scattered ischemic white matter changes (green-blue) are seen.
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