Extracranial Meningioma

Michel, Randall G.; Woodard, Brett H.

doi:10.1177/000348947908800319

Cited by 15 publications

(8 citation statements)

References 30 publications

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“…The remainder consisted of cutaneous involvement by deeply seated, primary ectopic meningiomas or direct extension by GNS meningiomas. Based on descriptions of the latter 2 categories (12-16) and a review of numerous reports of analogous tumors that spared the skin (6)(7)(8)(9)(10)(11)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36), deeply seated primary ectopic meningiomas and meningiomas that extend form the GNS are invariably acquired lesions and always exhibit a microscopic picture similar to that of intracranial meningioma. Their architectural patterns are those of a true neoplasm.…”

Section: Discussionmentioning

confidence: 99%

Rudimentary meningocele: a variant of “primary cutaneous meningioma”

Sibley

Cooper

1989

J Cutan Pathol

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We studied 5 primary cutaneous meningiomas. All were congenital. Four were nodules or plaques on the scalp, and one was a lumbar polyp. Two were alopecic. A skull defect was present deep to one lesion, and the lumbar polyp was attached to dura. The tumors were concentrated in the subcutis, where strands of meningocytes were embedded in dense collageous tissue. Meningocytes wrapped around collagenous fibers, producing "collagen bodies". These formed the nidus for calcification that included psammoma bodies. Meningocytes also dissected between collagenous fibers, creating anastomosing spaces that mimicked a vascular tumor. Meningothelial-lined clefts, several milimeters in length, were present in 4 cases. Two lesions extended through dermal defects into the superficial dermis, where adnexa were reduced or absent. The meningocytes contained vimentin and epithelial membrane antigen. They lacked cytokeratin, S100 protein, and endothelial markers. The meningothelial lesions described herein lack the nodular and sheet-like growth patterns that typify meningiomas of the central nervous system and most primary ectopic meningiomas, including some that develop within the skin. They appear closely related to meningoceles and should be viewed as developmental abnormalities rather than neoplasms. The term "rudimentary meningocele" seems appropriate for these lesions.

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Section: Discussionmentioning

confidence: 99%

Rudimentary meningocele: a variant of “primary cutaneous meningioma”

Sibley

Cooper

1989

J Cutan Pathol

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“…The orbit is affected most often, resulting in proptosis. 60 Within the cranial vault, common locations are the middle ear, near suture lines, and a possibly previous fractures. 77 As for fibrous dysplasia, a CT scan shows an expansile growth of bone with hyperostosis and a ground-glass appearance.…”

Section: Osteoblastomamentioning

confidence: 99%

Tumors of the Skull

Nguyen¹,

McComb²

2005

Textbook of Neuro-Oncology

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“…Meningiomas are the most common non-glial primary CNS tumors and the most common extra-axial intracranial tumors. The relative frequency of meningiomas regarding all intracranial tumors varies between 15% [1,3,4] and 20% [1,5,6]. They are encountered in middle-aged adults and are more common in women than in men.…”

Section: Meningiomasmentioning

confidence: 99%

Extra-axial brain tumors

Drevelegas

2004

Eur Radiol

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Meningiomas, schwannomas, metastases, maldevelopmental cysts, epidermoids, dermoids and bone tumors represent the vast majority of extra-axial brain tumors. The location of extra-axial brain tumors affects treatment planning and predicts their prognosis. Computed tomography and particularly magnetic resonance imaging are used for diagnosis and localization. In this article, the imaging findings of the extra-axial brain tumors are discussed.Keywords Extra-axial . Brain tumors . MRI . Meningioma . Schwannoma Extra-axial tumors are the tumors of extracerebral location. They are usually benign. The location of brain tumors affects treatment planning and predicts their prognosis. The multiplanar capability of MR imaging makes it the best technique in the evaluation of extra-axial brain tumors. Meningiomas are the most common exta-axial neoplasms in the supratentorial compartment. Other extra-axial neoplasms are: schwannomas, metastatic lesions, arachnoid cysts, epidermoids, dermoids, chordomas and eosinophilic granulomas. MeningiomasMeningiomas are vascular, non-glial tumors of the central nervous system arising from meningothelial (arachnoidal) cells. They generally receive their blood supply from branches of the external carotid arteries, although large tumors will also recruit branches from the internal carotid arteries [1,2]. Meningiomas are the most common non-glial primary CNS tumors and the most common extra-axial intracranial tumors. The relative frequency of meningiomas regarding all intracranial tumors varies between 15% [1, 3, 4] and 20% [1,5,6]. They are encountered in middle-aged adults and are more common in women than in men. Childhood meningiomas are uncommon and represent 1-4.2% of central nervous system tumors and 1.5-1.8% of all intracranial meningiomas [7][8][9][10][11].The presenting signs and symptoms of meningiomas, when neurofibromatosis is excluded, are related to the tumor location and size, they are often non-specific and vague, primarily related to brain compression and edema from the adjacent neoplasm [1,12]. Signs of increased cranial pressure (nausea, headache, vomiting) are found in 50% of the patients. Confusion, focal weakness and seizures are the most common symptoms while paresis is the most frequently found physical sign [1,13,14]. Headache has been reported as the most common single presenting symptom, found in 36%, while normal physical examination has been reported in 26% of patients [12].The most common locations of meningiomas in descending order of frequency are: convexity meningiomas 20-34%, parasagittal 18-22%, sphenoid and middle cranial fossa 17-25%, frontobasal 10% and posterior fossa 9-15%.

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Extracranial Meningioma

Cited by 15 publications

References 30 publications

Rudimentary meningocele: a variant of “primary cutaneous meningioma”

Rudimentary meningocele: a variant of “primary cutaneous meningioma”

Tumors of the Skull

Extra-axial brain tumors

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