Meningioma: Difference between revisions
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{{NoteBox|secondary}}<strong>Related pages</strong> | {{NoteBox|secondary}}<strong>Related pages</strong> | ||
* [[cavernous sinus meningioma|Cavernous sinus Meningiomas]]{{NoteBoxEnd}} | * [[Anterior skull base Meningiomas]] | ||
* [[cavernous sinus meningioma|Cavernous sinus Meningiomas]] | |||
* [[Parasagittal and falx meningiomas]]{{NoteBoxEnd}} | |||
[[File:BT SupTentPostFossa OlfGrve 02.jpg|thumb|454x454px]] | |||
= 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. | |||
<br clear="all"> | |||
= Diagnosis = | |||
== Imaging findings == | |||
* Wide dural based | |||
* Hyperostosis | |||
* Dural tail | |||
* Calcifications | |||
* Homogeneous enhancement | |||
* Pneumosinus dilatans | |||
* MRI: isointense on T1WI, hypointense on T2WI | |||
[[File: | == Histopathology == | ||
[[File:Meningioma - Histopathology .jpg|thumb|500x500px]] | |||
* The tumour cells have features of both syncytial and fibroblastic type forming <mark>whorls</mark> which contain central laminated areas of calcification called <mark>psammoma bodies</mark>. | |||
<br clear="all"> | <br clear="all"> | ||
= | === Meningioma Grades === | ||
{| class="wikitable" style="width:100%;" | |||
* | ! GRADE I | ||
* | ! GRADE II | ||
! GRADE III | |||
|- | |||
| | |||
* Meningothelial meningioma | |||
* Fibrous meningioma | |||
* Transitional meningioma | |||
* Psammomatous meningioma | |||
* Angiomatous meningioma | |||
* Microcystic meningioma | |||
* Secretory meningioma | |||
* Lymphoplasmacyte-rich meningioma | |||
* Metaplastic meningioma | |||
| | |||
* Atypical meningioma | |||
* Clear cell meningioma | |||
* Chordoid meningioma | |||
| | |||
* Rhabdoid meningioma | |||
* Papillary meningioma | |||
* Anaplastic (malignant) meningioma | |||
|} | |||
== | == Immunohistochemical staining == | ||
* EMA ⊕ in ~80% | |||
[[Category:Neuro-Oncology]] | [[Category:Neuro-Oncology]] | ||
[[Category:Meningioma]] | [[Category:Meningioma]] | ||
[[Category:Extrinsic Brain Tumors]] | [[Category:Extrinsic Brain Tumors]] | ||
Latest revision as of 22:57, 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.
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.
Meningioma Grades
| GRADE I | GRADE II | GRADE III |
|---|---|---|
|
|
|
Immunohistochemical staining
- EMA ⊕ in ~80%