Spinal meningioma

meningioma /me·nin·gi·o·ma/ (mĕ-nin″je-o´mah) a benign, slow-growing tumor of the meninges, usually next to the dura mater, which may invade the skull or cause hyperostosis, and often causes increased intracranial pressure; it is usually subclassified on the basis of anatomic location.

angioblastic meningioma one containing many blood vessels of various sizes.

convexity meningiomas a diverse group of meningiomas located within the sulci of the brain, usually anterior to the rolandic fissure.

psammomatous meningioma one containing many psammoma bodies.

me·nin·gi·o·ma (m

-n

)

n. pl. me·nin·gi·o·mas or me·nin·gi·o·ma·ta (-m

-t

)

A slow-growing tumor of the meninges often creating pressure and damaging the brain and adjacent tissues, occurring most often in adults.

meningioma

[minin′jē·ō′mə] pl. meningiomas, meningiomata

Etymology: Gk, meninx, membrane, oma, tumor

a mesenchymal fibroblastic tumor of the membranes enveloping the brain and spinal cord. Meningiomas grow slowly, are usually vascular, and occur most commonly near the superior longitudinal transverse and cavernous sinuses of the dura mater of the brain. The tumors may be nodular, plaquelike, or diffuse lesions that invade the skull, causing bone erosion and compression of brain tissue. Meningiomas usually occur in adults.

meningioma [mĕ-nin″je-o´mah]

a hard, usually vascular tumor occurring mainly along the meningeal vessels and superior longitudinal sinus, invading the dura and skull and leading to erosion and thinning of the skull.

angioblastic meningioma angioblastoma (def. 2).

meningioma

nin´jēō´m

),
n a mesenchymal fibroblastic tumor of the membranes enveloping the brain and spinal cord. They grow slowly, are usually vascular, and occur most commonly near the superior longitudinal, transverse, and cavernous sinuses of the dura mater of the brain.

meningioma

a common, well-defined, firm intracranial neoplasm of animals arising from leptomeningeal cells, which occurs in basal locations, over the cerebral, cerebellar convexities, and in the spinal cord. One subtype is characterized by psammoma bodies (central calcified material).

angioblastic meningioma

angioblastoma.

epithelioid meningioma

see meningotheliomatous meningioma (below).

meningotheliomatous meningioma

a diffusely cellular mesodermal tumor with cells in sheets or in pseudoalveoli.

meningioma

Neurosurgery A tumor of meninges and meningeal cells, most common in middle-aged ♀ Clinical Often asymptomatic, usually slow-growing masses, attached to dura, usually where arachnoid villi are prominent; Sx are related to tumor growth and compression Prognosis 5-yr survival 70%. See Malignant meningioma.

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