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meningioma
me·nin·gi·o·ma M0217550 (mə-nĭn′jē-ō′mə)n. pl. me·nin·gi·o·mas or me·nin·gi·o·ma·ta (-mə-tə) A slow-growing tumor of the meninges, occurring most often in adults.
[Short for meningothelioma : meningo- + (endo)thelioma.]meningioma (məˌnɪndʒɪˈəʊmə) n (Pathology) a tumour of the meninges of the brain that grows slowly and is usually benign, although it can be malignantme•nin•gi•o•ma (məˌnɪn dʒiˈoʊ mə)
n., pl. -mas, -ma•ta (-mə tə) a hard, encapsulated tumor that grows slowly along the meninges. [1920–25; shortening of meningothelioma= mening (es) + -o- + (endo)thelioma a tumor originating in the endothelium] Thesaurus| Noun | 1. |  meningioma - a tumor arising in the meninges which surround the brain and spinal cord; usually slow growing and sometimes malignantneoplasm, tumor, tumour - an abnormal new mass of tissue that serves no purpose |
Translationsmeningioma
meningioma[mə‚nin·jē′ō·mə] (medicine) A localized tumor composed of meningeal cells, involving the meninges and other central nervous system structures. Also known as meningothelioma. meningioma
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).me·nin·gi·o·ma (mĕ-nin'jē-ō'mă), A benign, encapsulated neoplasm of arachnoidal origin, occurring most frequently in adults; most common form consists of elongated, fusiform cells in whorls and pseudolobules with psammoma bodies frequently present; meningiomas tend to occur along the superior sagittal sinus, along the sphenoid ridge, or in the vicinity of the optic chiasm; in addition to meningothelial meningioma, fibrous, transitional, metaplastic, psammomatous, secretory, clear cell, papillary, rhabdoid, chordoid, lymphoplasmocytic, angiomatous, microcystic, rhabdoid, atypical, and anaplastic varieties are recognized. [mening- + G. -oma, tumor] meningioma (mə-nĭn′jē-ō′mə)n. pl. meningio·mas or meningio·mata (-mə-tə) A slow-growing tumor of the meninges, occurring most often in adults.meningioma A tumour of meninges and meningeal cells, which is most common in middle-aged women and may occur in a background of neurofibromatosis type 2. Aggressive meningiomas are characterised by bone destruction, florid mitotic activity and metastases.
Clinical findings
Often asymptomatic, slow-growing masses attached to the dura, usually where arachnoid villi are prominent. The symptoms are related to tumour growth and compression.
Prognosis
5-year survival, 70%.
Types
Grade 1—Benign/typical
• Angiomatous
• Fibrous (fibroblastic)
• Lymphoplasmacyte-rich
• Meningiothelial
• Metaplastic
• Microcystic
• Psammomatous
• Secretory
• Transitional (mixed)
Grade 2—Atypical
• Chordoid
• Clear cell
• Oncocytic
Grade 3—Malignant/anaplastic
• Anaplastic
• Papillary
• Rhabdoidmeningioma 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. me·nin·gi·o·ma (mĕ-nin'jē-ō'mă) A benign, encapsulated neoplasm of arachnoidal origin, occurring most frequently in adults; most frequent form consists of elongated, fusiform cells in whorls and pseudolobules with psammoma bodies frequently present; meningiomas tend to occur along the superior sagittal sinus, along the sphenoid ridge, or in the vicinity of the optic chiasm; in addition to meningothelial meningioma, angiomatous, chondromatous, osteomatous, lipomatous, melanotic, fibroblastic and transitional varieties are recognized. [mening- + G. -oma, tumor]meningioma A tumour of the cells of the MENINGES. Most meningiomas are fixed to the DURA MATER and are benign but, because of their location and the bony surroundings of the nervous system, may do serious damage by compression of neurological structures. Treatment is by surgical removal and this is often successful.me·nin·gi·o·ma (mĕ-nin'jē-ō'mă) A benign, encapsulated neoplasm of arachnoidal origin, occurring most frequently in adults; tends to occur along the superior sagittal sinus, along the sphenoid ridge, or in the vicinity of the optic chiasm. [mening- + G. -oma, tumor]meningioma
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