Canadian Medical Guide > Diseases > Neoplasms > Neoplasms by Histologic Type > Neoplasms, Nerve Tissue > Meningioma Terms and Definitions

Meningioma

Medical Definition:	A relatively common neoplasm of the central nervous system that arises from arachnoidal cells. The majority are well differentiated vascular tumors which grow slowly and have a low potential to be invasive, although malignant subtypes occur. Meningiomas have a predilection to arise from the parasagittal region, cerebral convexity, sphenoidal ridge, olfactory groove, and spinal canal. They tend to present in the fourth to sixth decades of life with signs indicative of a slowly progressive mass lesion. Specific clinical manifestations depend on the location of the tumor, but may include INTRACRANIAL HYPERTENSION, cranial neuropathies, ataxia, and other focal neurologic signs. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2056-7)
Guide Notes:	benign or malignant; coord IM with MENINGEAL NEOPLASMS (IM) but not with BRAIN NEOPLASMS nor SPINAL CORD NEOPLASMS for intracranial or spinal meningioma unless site is particularly discussed
Also Called:	Meningotheliomatous Meningioma,Microcystic Meningioma,Papillary Meningioma,Parasagittal Meningioma,Angioblastic Meningioma,Benign Meningioma,Clear Cell Meningioma,Hemangioblastic Meningioma,Meningiomas, Multiple,Malignant Meningioma,Intracranial Meningioma,Hemangiopericytic Meningioma,Fibrous Meningioma,Cerebral Convexity Meningioma,Angiomatous Meningioma,Psammomatous Meningioma,Secretory Meningioma,Transitional Meningioma,Xanthomatous Meningioma

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