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Difference between revisions of "Meningioma"
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→Morphologic subtypes: +meningioma
m (→Morphologic subtypes: +meningioma) |
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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. | ||
===== | =====Rhabdoid meningioma===== | ||
Microscopic: | Microscopic: | ||
*Rhabdoid appearance (abundant cytoplasm). | *Rhabdoid appearance (abundant cytoplasm). | ||