Meningioma: Difference between revisions

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{{NoteBox|secondary}}<strong>Related pages</strong>
{{NoteBox|secondary}}<strong>Related pages</strong>
* [[Anterior skull base Meningiomas]]
* [[cavernous sinus meningioma|Cavernous sinus Meningiomas]]{{NoteBoxEnd}}
* [[cavernous sinus meningioma|Cavernous sinus Meningiomas]]{{NoteBoxEnd}}
[[File:BT SupTentPostFossa OlfGrve 02.jpg|thumb|454x454px]]
[[File:BT SupTentPostFossa OlfGrve 02.jpg|thumb|454x454px]]
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= Anterior skull base Meningiomas =
== Nomenclature ==
* Olfactory Groove Meningiomas (OGM) [[File:Nomenclature of anterior skull base meningiomas.jpg|thumb|400x400px|Nomenclature of anterior skull base meningiomas]]
* Planum Sphenoidale Meningiomas
* Tuberculum Sellae Meningioma (TSM)


== Clinical Presentation ==
* Personality Δ
* H/A
* Sz's
* Visual deficits
* Anosmia
* [[Foster-Kennedy syndrome]] of unilateral optic atrophy and contralateral papilledema
== Comparison of OGM and TSM ==
<table class="wikitable"><tr>
    <th width = "20%">Factor</th>
    <th width = "40%">OGM</th>
    <th width = "40%">TSM</th>
  </tr>
  <tr>
    <td>Location</td>
    <td>Cribriform, frontosphenoid suture</td>
    <td>Planum sphenoidale, tuberculum sellae</td>
  </tr>
  <tr>
    <td>Blood supply</td>
    <td>Ant & pos ethmoidals, middle meningeal, ophthalmic (meningeal branch, ACA & ACoA)</td>
    <td>Pos ethmoidal (ACA & ACoA)</td>
  </tr>
  <tr>
    <td>Olfactory nerves</td>
    <td>Superolat</td>
    <td>Inferolat</td>
  </tr>
  <tr>
    <td>Optic nerve/chiasm</td>
    <td>Inferolat</td>
    <td>Superolat</td>
  </tr>
  <tr>
    <td>ACA</td>
    <td>Pos. to posterosuperior</td>
    <td>Posterosuperior</td>
  </tr>
</table>


= Parasagittal and falx meningiomas =  
= Parasagittal and falx meningiomas =  

Revision as of 22:30, 4 March 2024

Related pages

General information

  • Meningiomas are a group of tumors that are believed to originate in meningothelial cells of the arachnoid membrane.
  • They may be intracranial (MC), intraorbital, or intra-spinal.



Parasagittal and falx meningiomas

Sindou grading

Grading of meningioma invasion to SSS

  • Type I - attachment to lat. wall of sinus.
  • Type II - invasion of lat. recess.
  • Type III - invasion of lat. wall.
  • Type IV - invasion of lat. wall & roof.
  • Type V - total sinus occlusion, contral. wall spared.
  • Type VI - total sinus occlusion, invasion of all walls.

Diagnosis

Imaging findings

  • Wide dural based
  • Hyperostosis
  • Dural tail
  • Calcifications
  • Homogeneous enhancement
  • Pneumosinus dilatans
  • MRI: isointense on T1WI, hypointense on T2WI

Histopathology

  • The tumour cells have features of both syncytial and fibroblastic type forming whorls which contain central laminated areas of calcification called psammoma bodies.
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