-
Lesions with no enhancement:
cysts, tumors with intact BBB (low-grade gliomas)
-
Lesions with strong enhancement:
meningioma, medulloblastoma/PNET, AVM, paraganglioma, aneurysm, HIV-associated lymphoma, GBM
-
Ring enhancement:
mets, abscess, GBM, infarct, contusion, AIDS, lymphoma, demyelinating, resolving hematoma, radiation
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Diffuse meningeal enhancement:
meningitis, carcinomatosis (lymphoma, mets), post-op, SAH, intracranial hypotension, CSF leak
-
Basilar meningeal enhancement: infection �
TB (#1), fungal, pyogenic (more common on convexity), cysticercosis;
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Basilar meningeal enhancement: tumor �
lymphoma, leukemia, carcinomatosis;
-
Basilar meningeal enhancement: inflammatory �
sarcoid, rheumatoid pachymeningitis, drugs, pantopaque, ruptured dermoid
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