angioblastic 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.

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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.

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angioblastic meningioma,

a tumor of the blood vessels of the meninges covering the spinal cord or the brain.

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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).

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angioblastic meningioma

angioblastoma.

epithelioid meningioma

see meningotheliomatous meningioma (below).

meningotheliomatous meningioma

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