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| ==Subependymal giant cell astrocytoma== | | ==Subependymal giant cell astrocytoma== |
| *Abbreviated ''SEGA''. | | *Abbreviated ''SEGA''. |
| | | {{Main|Subependymal giant cell astrocytoma}} |
| ===General===
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| *Associated with [[tuberous sclerosis complex]] (TSC).<ref name=pmid21455842>{{Cite journal | last1 = Grajkowska | first1 = W. | last2 = Kotulska | first2 = K. | last3 = Jurkiewicz | first3 = E. | last4 = Roszkowski | first4 = M. | last5 = Daszkiewicz | first5 = P. | last6 = Jóźwiak | first6 = S. | last7 = Matyja | first7 = E. | title = Subependymal giant cell astrocytomas with atypical histological features mimicking malignant gliomas. | journal = Folia Neuropathol | volume = 49 | issue = 1 | pages = 39-46 | month = | year = 2011 | doi = | PMID = 21455842 }}</ref>
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| *WHO Grade I.
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| ===Gross/radiology===
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| *Well-demarcated.
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| ===Microscopic===
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| Features:<ref name=upmc_case179/><ref name=pmid9595853>{{Cite journal | last1 = Taraszewska | first1 = A. | last2 = Kroh | first2 = H. | last3 = Majchrowski | first3 = A. | title = Subependymal giant cell astrocytoma: clinical, histologic and immunohistochemical characteristic of 3 cases. | journal = Folia Neuropathol | volume = 35 | issue = 3 | pages = 181-6 | month = | year = 1997 | doi = | PMID = 9595853 }}</ref>
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| *Giant cells with nuclear atypia ("bizarre cells").
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| **Vesicular nuclei.
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| **[[Nuclear pseudoinclusions]].<ref name=upmc179>URL: [http://path.upmc.edu/cases/case179/micro.html http://path.upmc.edu/cases/case179/micro.html]. Accessed on: 8 January 2012.</ref>
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| *Glassy eosinophilic cytoplasm.
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| *Abundant [[mast cell]]s.<ref name=upmc179>URL: [http://path.upmc.edu/cases/case179/micro.html http://path.upmc.edu/cases/case179/micro.html]. Accessed on: 8 January 2012.</ref>
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| Images:
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| *[http://path.upmc.edu/cases/case179/micro.html SEGA (upmc.edu)].<ref name=upmc_case179>URL: [http://path.upmc.edu/cases/case179.html http://path.upmc.edu/cases/case179.html]. Accessed on: 29 July 2011.</ref>
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| *[http://path.upmc.edu/cases/case500.html SEGA - another case (upmc.edu)].
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| ===IHC===
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| Features:<ref name=pmid9595853/>
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| *GFAP +ve. (???)
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| *Vimentin +ve. (???)
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| *S100 +ve. (???)
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| ==Pilomyxoid astrocytoma== | | ==Pilomyxoid astrocytoma== |