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Meningioma, MedPix™ : 804 - Medical Image Database and Atlas
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Location:
More Like This ? Brain and Neuro
Sublocation:
More Like This ? Dura, Falx, Tentorium, Sinus
Category:
More Like This ? Neoplasm, non-glial
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More Like This ? Meningioma
Topic 804 - Created: 2000-02-09 12:14:49-05 - Modified: 2003-10-03 17:26:15-04
ACR Index: 1.3

Meningiomas are the most common non-glial primary tumor of the CNS. Meningiomas are also the most common extraaxial primary tumor of the CNS. They represent 15-25% of all intracranial primary tumors. Most patients are in the 5th and 6th decades (40's - 50's). The 2x-4x female predilection is most likely due to hormone receptors for progesterone and estrogen.

The tumor arises from the arachnoid cap cells and is usually a slowly growing intradural intracranial mass, with a broad base of attachment to the overlying dura. Hyperostosis of the overlying skull occurs in 15-25% of cases and may be a "sympathetic reaction" - or - can indicate invasion of the skull.

Meningiomas are the 4H Plus tumor:
H - hemispheric
H - homogeneous
H - homogeneously enhancing
H - hyperdense (CT)
H - hyperostosis
H - hormonally reactive (progesterone/estrogen)

Contributor Credits

Topic Submitted by: James G. Smirniotopoulos, M.D. - Author Info
Affiliation: Uniformed Services University
Topic approved by: James G. Smirniotopoulos, M.D. - Editor Info
Affiliation: Uniformed Services University

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