Neoplasms |
Skull base metastases |
Dural metastases |
Parenchymal brain metastases |
Primary leptomeningeal melanomatosis |
Infections |
Opportunistic (tuberculosis, cryptococcus) |
Meningitis (bacterial or viral) |
Lyme disease |
West Nile virus |
Autoimmune |
Vasculitis |
Sarcoidosis |
Granulomatosis with polyangiitis (Wegener's) |
Langerhans cell histiocytosis |
Bell's palsy |
Artifact |
Post-radiotherapy nerve root thickening and/or enhancement |
Post-lumbar puncture |
Intracranial hypovolemia |
Intracranial hypotension |
Enhancing meningeal blood vessels |
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