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| ==Neurocytoma== | | ==Neurocytoma== |
| ===General===
| | {{Main|Neurocytoma}} |
| *Rare.
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| ===Microscopic===
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| Features:<ref>URL: [http://moon.ouhsc.edu/kfung/jty1/Composites/FNA0IE14-Neurocytoma-Micro.htm http://moon.ouhsc.edu/kfung/jty1/Composites/FNA0IE14-Neurocytoma-Micro.htm]. Accessed on: 12 October 2011.</ref>
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| *[[Pineocytoma|Pineocytomatous]]/neurocytic rosette = irregular rosette with a large meshwork of fibers (neuropil) at the centre.<ref name=pmid16551982>{{cite journal |author=Wippold FJ, Perry A |title=Neuropathology for the neuroradiologist: rosettes and pseudorosettes |journal=AJNR Am J Neuroradiol |volume=27 |issue=3 |pages=488–92 |year=2006 |month=March |pmid=16551982 |doi= |url=}}</ref>
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| **Similar to Homer-Wright rosette.
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| *Perinuclear clearing.
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| *Well-defined cell borders.
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| DDx:
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| *[[Oligodendroglioma]] - do not have the characteristic rosettes.
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| *[[Ganglioglioma]].
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| *[[Ependymoma]].
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| Images:
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| *[http://moon.ouhsc.edu/kfung/jty1/Composites/FNA0IE14-Neurocytoma-Micro.htm Neurocytoma (ouhsc.edu)].
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| *[http://path.upmc.edu/cases/case383.html Neurocytoma - several images (upmc.edu)].
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| *[http://path.upmc.edu/cases/case561.html Neurocytoma - cerebellar - several images (upmc.edu)].
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| ===IHC===
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| *Synaptophysin +ve.
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| **Most glial tumour -ve.<ref>URL: [http://path.upmc.edu/cases/case383/dx.html http://path.upmc.edu/cases/case383/dx.html]. Accessed on: 15 January 2012.</ref>
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| ==Central neurocytoma== | | ==Central neurocytoma== |