Difference between revisions of "Meningioma"

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155 bytes added ,  16:16, 3 January 2012
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====Grade I====
====Grade I====
=====Meningothelial=====
=====Meningothelial meningioma=====
*Most common.
*Most common.


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*Syncytial, nuclear clearing ([[pseudoinclusions]]).
*Syncytial, nuclear clearing ([[pseudoinclusions]]).


=====Fibrous=====  
=====Fibrous meningioma=====  
*AKA fibroblastic.
*AKA fibroblastic.
*Not collagen but looks like it. (It is really laminin or fibronectin).
*Not collagen but looks like it. (It is really laminin or fibronectin).


=====Transistional=====
=====Transistional meningioma=====
*Rare.
*Rare.


=====Psammomatous=====
=====Psammomatous meningioma=====
Microscopic:  
Microscopic:  
*[[Psammoma bodies]].
*[[Psammoma bodies]].


=====Angiomatous=====
=====Angiomatous meningioma=====
*AKA vascular.
*AKA vascular.
*May bleed like stink.
*May bleed like stink.


=====Microcystic=====
=====Microcystic meningioma=====
Microscopic:  
Microscopic:  
*Cystic appearance.
*Cystic appearance.


=====Secretory=====
=====Secretory meningioma=====
*Assoc. with brain edema; may have a worse outcome.
*Assoc. with brain edema; may have a worse outcome.


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*Metastatic mucinous adenocarcinoma.
*Metastatic mucinous adenocarcinoma.


=====Lymphoplasmacyte-rich=====
=====Lymphoplasmacyte-rich meningioma=====
Microscopic:
Microscopic:
*Lymphocytes.
*Lymphocytes.
*Plasma cells.
*Plasma cells.
=====Metaplastic=====
=====Metaplastic meningioma=====
*Much talked about... but very rare.
*Much talked about... but very rare.


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====Grade II====
====Grade II====
=====Invasive=====  
=====Invasive meningioma=====  
*Invades the brain.
*Invades the brain.


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*[http://moon.ouhsc.edu/kfung/jty1/Composites/FNA0IE18-Meningioma-Invasion.htm Meningioma with brain invasion (ouhsc.edu)].
*[http://moon.ouhsc.edu/kfung/jty1/Composites/FNA0IE18-Meningioma-Invasion.htm Meningioma with brain invasion (ouhsc.edu)].


=====Clear cell=====
=====Clear cell meningioma=====
Epidemiology:  
Epidemiology:  
*Usu. spinal cord.<ref>{{Ref PSNP|200}}</ref>
*Usu. spinal cord.<ref>{{Ref PSNP|200}}</ref>
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*[http://blog.lib.umn.edu/santa013/neuropathology/2009/10/meningioma-with-clear-cell-features.html Clear cell meningioma (umn.edu)].
*[http://blog.lib.umn.edu/santa013/neuropathology/2009/10/meningioma-with-clear-cell-features.html Clear cell meningioma (umn.edu)].


=====Chordoid=====  
=====Chordoid meningioma=====  
*Chordoma-like.
*Chordoma-like.


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====Grade III====
====Grade III====
=====Papillary=====
=====Papillary meningioma=====
Microscopic:  
Microscopic:  
*True papillae.
*True papillae.
=====Rhaboid=====
=====Rhabdoid meningioma=====
Microscopic:  
Microscopic:  
*Rhabdoid appearance (abundant cytoplasm).
*Rhabdoid appearance (abundant cytoplasm).
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