Meningioma

A rare, mostly benign, primary tumor of the meninges (arachnoid cap cells), usually located in the supratentorial compartment, commonly appearing in the sixth and seventh decade of life, clinically silent in most cases or causing hyperostosis close to the tumor and resulting in focal bulging and localized pain in less than 10% of cases. Additional features may include headache, seizures, gradual personality changes (apathy and dementia), anosmia, impaired vision, exophthalmos, hearing loss, ataxia, dysmetria, hypotonia, nystagmus, and rarely spontaneous bleeding.

Leptomeningeal enhancement

Contrast material enhancement of the pia mater or enhancement that extends into the subarachnoid spaces of the sulci and cisterns is leptomeningeal enhancement. Leptomeningeal enhancement is usually associated with meningitis, which may be bacterial, viral, or fungal. The primary mechanism of this enhancement is breakdown of the blood-brain barrier without angiogenesis.

Total: 2

(per page)

PMID (PMCID)
10669237	MALE
	MR imaging features of clear-cell meningioma with diffuse leptomeningeal seeding.
	Lee W, Chang KH, Choe G, Chi JG, Chung CK, Kim IH, Han MH, Park SW, Shin SJ, Koh YH. AJNR Am J Neuroradiol. 2000;21(1):130-2.
	We present a case of clear-cell meningioma in a 17-year-old man in whom initial MR imaging showed localized leptomeningeal enhancement that had progressed into the entire subarachnoid space after surgical resection of the primary tumor.
8118713	MALE	Middle Aged
	Meningeal metastasis of the cerebellopontine angle demonstrating "dural tail" sign.
	Quint DJ, McGillicuddy JE. Can Assoc Radiol J. 1994;45(1):40-3.
	Local leptomeningeal enhancement adjacent to a dural-based mass, observed in magnetic resonance images, has been called a "dural tail" and was initially considered a sign specific for meningioma.