Pineocytoma
Pineocytoma, is a benign, slowly growing tumor of the pineal gland. Unlike the similar condition pineal gland cyst, it is uncommon.
| Pineocytoma | |
|---|---|
| Other names | Pinealocytoma |
 | |
| Micrograph of a pineocytoma. HPS stain. | |
| Specialty | Oncology  |
Diagnosis
Pineocytomas are diagnosed from tissue, i.e. a brain biopsy.
They consist of:
- cytologically benign cells (with nuclei of uniform size, regular nuclear membranes, and light chromatin) and,
- have the characteristic pineocytomatous/neurocytic rosettes, which is an irregular circular/flower-like arrangement of cells with a large meshwork of fibers (neuropil) at the centre.[1] Pineocytomatous/neurocytic rosettes are superficially similar to Homer Wright rosettes; however, they differ from Homer Wright rosettes as they have (1) more neuropil at centre of the rosette and, (2) the edge of neuropil meshwork irregular/undulating.
Management
gollark: First-past-the-post is fairly terrible for encouraging more than 2 parties to exist.
gollark: In America.
gollark: You cannot. The electoral system does not seem to encourage this.
gollark: I mean, it's not like they can just import everything they need to survive if they can't do any significant industry or exports.
gollark: Have you tried converting incoming ~400-700nm electromagnetic radiation into electrical signals, then transmitting those electrochemically to your visual cortex?
See also
References
- Wippold FJ, Perry A (March 2006). "Neuropathology for the neuroradiologist: rosettes and pseudorosettes". AJNR Am J Neuroradiol. 27 (3): 488–92. PMID 16551982.
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