Intraventricular meningioma

Changed by Patrick J Rock, 22 May 2021
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Intraventricular meningiomas, although are rare intracranial tumours, are a common type of intraventricular neoplasm in adults. They account for less than 3% of all meningiomas. 

On imaging, they classically present as vividly enhancing solid mass at the trigone of the lateral ventricles.

Epidemiology

Most intraventricular meningiomas presentbetween the 3rd and 6th decades 3,6 with a recognised female predilection (M:F ratio of 1:2) 4,6.

Clinical presentation

Intraventricular meningiomas present usually due to mass effect, either by direct compression of the adjacent brain or from obstruction to normal CSF drainage with resultant hydrocephalus.

Pathology

Intraventricular meningiomas are thought to arise from mengingothelial inclusion bodies located in the tela choroidea and/or mesenchymal stroma of the choroid plexus  5,6. In general, these meningiomas are most commonly of the fibrous meningiomas 5.

Location

They are most frequently (80%) seen at the trigone of the lateral ventricles and, for reasons that are not clear, slightly more frequently on the left. Considering the distribution of meningiomas, the intraventricular location is comparatively morecommon in children (20% of paediatric meningiomas).

Radiographic features

Their signal and attenuation characteristics are the same as other meningiomas, demonstrating essentially isodensity and intensity to grey matter precontrast and vivid, usually homogenoushomogeneous enhancement following administration of contrast. Compared to extra-axial meningiomas, a greater proportion is calcified (50% compared to 20% for standard meningioma).

For further discussion of the radiographic appearances of these tumours, refer to the general article: meningioma.

Treatment and prognosis

As is the case with other meningiomas, provided complete excision is possible, surgical excision is curative and therefore the treatment of choice.

Differential diagnosis

The differential somewhat depends on the location of the tumour and age of the patient, however, in general considerations should include:

See also

  • -</ul><h4>Radiographic features</h4><p>Their signal and attenuation characteristics are the same as other meningiomas, demonstrating essentially isodensity and intensity to grey matter precontrast and vivid, usually homogenous enhancement following administration of contrast. Compared to extra-axial meningiomas, a greater proportion is calcified (50% compared to 20% for standard meningioma).</p><p>For further discussion of the radiographic appearances of these tumours, refer to the general article: <a href="/articles/meningioma">meningioma</a>.</p><h4>Treatment and prognosis</h4><p>As is the case with other meningiomas, provided complete excision is possible, surgical excision is curative and therefore the treatment of choice.</p><h4>Differential diagnosis</h4><p>The differential somewhat depends on the location of the tumour and age of the patient, however, in general considerations should include:</p><ul>
  • +</ul><h4>Radiographic features</h4><p>Their signal and attenuation characteristics are the same as other meningiomas, demonstrating essentially isodensity and intensity to grey matter precontrast and vivid, usually homogeneous enhancement following administration of contrast. Compared to extra-axial meningiomas, a greater proportion is calcified (50% compared to 20% for standard meningioma).</p><p>For further discussion of the radiographic appearances of these tumours, refer to the general article: <a href="/articles/meningioma">meningioma</a>.</p><h4>Treatment and prognosis</h4><p>As is the case with other meningiomas, provided complete excision is possible, surgical excision is curative and therefore the treatment of choice.</p><h4>Differential diagnosis</h4><p>The differential somewhat depends on the location of the tumour and age of the patient, however, in general considerations should include:</p><ul>

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