meningioma

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Related to meningiomas: gliomas, Pituitary adenomas

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
• Rhabdoid

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.

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]
References in periodicals archive ?
The most common subtypes attributed to meningiomas were transitional and meningothelial (BARNET et al., MAULDIN et al., 2000; REGAN et al., 2011; DUBIELIZIG, 2002).
Images were analyzed and reported as benign or malignant meningiomas according to DWI using ADC values and then compared with histopathological diagnosis obtained later after tumor resection at the Neurosurgery department of the same hospital.
Necrosis tumoral demostrada por RM posterior a la embolizacion de meningiomas intracraneales.
Peritumoral brain edema associated with meningiomas. Neurosurgery.
The most frequent histological type was found to be Meningiomas (48 cases, 60%), followed by Astrocytomas (20 cases, 25%).
All patients included in the study had solitary meningiomas. These patients were surgically treated at the Department of Neurosurgery, Zenica Cantonal Hospital by microneurosurgical resection.
The role of mifepristone in meningiomas management: a systematic review of the literature.
One case of meningioma (papillary subtype) was diagnosed as metastatic deposit due to papillae formation and highly atypical features [Figure 3a-d].
El riesgo de recurrencia "temprana" en los meningiomas WHO I se estudia mediante la investigacion de la expresion de la proteina osteopontina (2, 9, 19).
Histologically, these tumors are indistinguishable from normal intracranial meningiomas (7).
Some studies have suggested that a minority of MLNs may be clonal processes with shared genetic alterations with meningioma, including the characteristic loss of NF2.
Meningiomas are the most common benign intracranial tumor which are generally slow growing and can be asymptomatic or present secondary to mass affect.