Meningioma: Difference between revisions
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{{further|Brain/meningeal tumor}} | {{further|Brain/meningeal tumor}} | ||
</noinclude> | </noinclude> | ||
==Microscopic evaluation== | ==Microscopic evaluation== | ||
[[File:Histopathology of meningioma.png|thumb|Histopathology of a typical WHO grade 1 meningioma, | [[File:Histopathology of meningioma.png|thumb|Histopathology of a typical WHO grade 1 meningioma, H&E stain. It is of the meningothelial histologic type, which is the most common meningioma type. It shows its typical findings:<br>- A woven architectural pattern<br>- Psammoma bodies (spheroid calcifications)<br>- Syncytial cells (having indistinct cell membranes) with eosinophilic (pink) cytoplasms<br>- Round uniform nuclei<br>- Whorls (concentric cell arrangements)<ref>Image by Mikael Häggström, MD. Reference for typical findings: {{cite web|url=https://www.pathologyoutlines.com/topic/cnstumormeningiomageneral.html|title=Meningioma|website=Pathology Outlines|author=Chunyu Cai, M.D., Ph.D.}} Last author update: 10 November 2021}}</ref>]] | ||
Look for the signs of both typical meningioma and main histological variants. On frozen sections, mention the presence of atypia/high-grade cells. | Look for the signs of both typical meningioma and main histological variants. On frozen sections, mention the presence of atypia/high-grade cells. | ||
<gallery mode=packed heights=210> | <gallery mode=packed heights=210> | ||