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Difference between revisions of "Pineal gland"
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*Cellular. | *Cellular. | ||
== | ==Overview== | ||
Tumours:<ref name=pmid20971711>{{cite journal |author=Gaillard F, Jones J |title=Masses of the pineal region: clinical presentation and radiographic features |journal=Postgrad Med J |volume=86 |issue=1020 |pages=597–607 |year=2010 |month=October |pmid=20971711 |doi=10.1136/pgmj.2009.087460 |url=}}</ref> | |||
*Primary pineal tumours ~15% of (pineal) tumours. | *Primary pineal tumours ~15% of (pineal) tumours - benign to malignant:<ref name=pmid21057132>{{cite journal |author=Smith AB, Rushing EJ, Smirniotopoulos JG |title=From the archives of the AFIP: lesions of the pineal region: radiologic-pathologic correlation |journal=Radiographics |volume=30 |issue=7 |pages=2001–20 |year=2010 |month=November |pmid=21057132 |doi=10.1148/rg.307105131 |url=}}</ref> | ||
**Pineocytoma. | **Pineocytoma. | ||
**Pineal parenchymal tumor of intermediate differentiation. | |||
**Pineoblastoma. | **Pineoblastoma. | ||
*Germ cell tumours | *Germ cell tumours: | ||
**Germinoma ~ 50% of (pineal) tumours. | **Germinoma ~ 50% of (pineal) tumours. | ||
**Teratoma ~ 15% of tumours. | **Teratoma ~ 15% of tumours. | ||
**Choricocarcinoma ~ 5% of tumours. | **Choricocarcinoma ~ 5% of tumours. | ||
*Others | *Others: | ||
**Direct invasion/extension from surrounding structures ( | **Direct invasion/extension from surrounding structures (astrocytomas). | ||
**Metastases. | **Metastases. | ||
**Lipomas. | |||
**Meningiomas. | |||
==Primary pineal tumours== | |||
Range from benign to malignant. | |||
==Pineocytoma== | |||
Features: | |||
*Cytologically benign cells (uniform size of nuclei, regular nuclear membrane, light chromatin). | |||
*Pineocytomatous/neurocytic rosette.<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> | |||
**Similar to Homer-Wright rosette - neuropil centre larger. | |||
**Rosette with a meshwork of fibers (neuropil) at the centre. | |||
==See also== | ==See also== | ||