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Difference between revisions of "Pneumocytoma"
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'''Pneumocytoma''' is a rare benign lesion of the [[lung]]. It is also known as '''benign sclerosing pneumocytoma'''.<ref name=pmid6291188>{{Cite journal | last1 = Chan | first1 = KW. | last2 = Gibbs | first2 = AR. | last3 = Lo | first3 = WS. | last4 = Newman | first4 = GR. | title = Benign sclerosing pneumocytoma of lung (sclerosing haemangioma). | journal = Thorax | volume = 37 | issue = 6 | pages = 404-12 | month = Jun | year = 1982 | doi = | PMID = 6291188 }}</ref> | |||
It was previously known as '''sclerosing hemangioma'''. | |||
==General== | |||
*Derived from type 2 pneumocyte.<ref name=pmid15138814>{{Cite journal | last1 = Yamazaki | first1 = K. | title = Type-II pneumocyte differentiation in pulmonary sclerosing hemangioma: ultrastructural differentiation and immunohistochemical distribution of lineage-specific transcription factors (TTF-1, HNF-3 alpha, and HNF-3 beta) and surfactant proteins. | journal = Virchows Arch | volume = 445 | issue = 1 | pages = 45-53 | month = Jul | year = 2004 | doi = 10.1007/s00428-004-1023-3 | PMID = 15138814 }}</ref> | |||
*Progesterone-receptor positive stromal cells.<ref name=pmid15731902>{{Cite journal | last1 = Einsfelder | first1 = BM. | last2 = Müller | first2 = KM. | title = ["Pneumocytoma" or "sclerosing hemangioma": histogenetic aspects of a rare tumor of the lung] | journal = Pathologe | volume = 26 | issue = 5 | pages = 367-77 | month = Sep | year = 2005 | doi = 10.1007/s00292-005-0751-8 | PMID = 15731902 }}</ref> | |||
===Epidemiology=== | |||
*Female in 40s.<ref name=pmid19415961>{{Cite journal | last1 = Keylock | first1 = JB. | last2 = Galvin | first2 = JR. | last3 = Franks | first3 = TJ. | title = Sclerosing hemangioma of the lung. | journal = Arch Pathol Lab Med | volume = 133 | issue = 5 | pages = 820-5 | month = May | year = 2009 | doi = | PMID = 19415961 }}</ref> | |||
*Considered benign; excision is curative. | |||
**Rare case reports of [[metastases]]. | |||
==Gross== | |||
*Peripheral, solitary. | |||
*Well-circumscribed. | |||
==Microscopic== | |||
Features:<ref name=pmid19415961>{{Cite journal | last1 = Keylock | first1 = JB. | last2 = Galvin | first2 = JR. | last3 = Franks | first3 = TJ. | title = Sclerosing hemangioma of the lung. | journal = Arch Pathol Lab Med | volume = 133 | issue = 5 | pages = 820-5 | month = May | year = 2009 | doi = | PMID = 19415961 }}</ref> | |||
*Mixed cell population. | |||
*Variable architecture: | |||
**Papillary. | |||
**Sclerotic. | |||
**Solid. | |||
**Hemorrhagic. | |||
* +/-Granulomas. | |||
DDx:<ref>URL: [http://www.med.muni.cz/biomedjournal/pdf/2004/01/37_42.pdf http://www.med.muni.cz/biomedjournal/pdf/2004/01/37_42.pdf]. Accessed on: 17 June 2010.</ref> | |||
*Papillary adenoma. | |||
*[[Neuroendocrine tumour]] (carcinoid). | |||
Image: | |||
*[http://moon.ouhsc.edu/kfung/jty1/Com/ComImage/Com309-1-SM2.gif Pneumocytoma (ouhsc.edu)].<ref>URL: [http://moon.ouhsc.edu/kfung/jty1/Com/Com309-1-Diss.htm http://moon.ouhsc.edu/kfung/jty1/Com/Com309-1-Diss.htm]. Accessed on: 14 April 2012.</ref> | |||
==IHC== | |||
Features:<ref name=pmid10716159>{{Cite journal | last1 = Rodriguez-Soto | first1 = J. | last2 = Colby | first2 = TV. | last3 = Rouse | first3 = RV. | title = A critical examination of the immunophenotype of pulmonary sclerosing hemangioma. | journal = Am J Surg Pathol | volume = 24 | issue = 3 | pages = 442-50 | month = Mar | year = 2000 | doi = | PMID = 10716159 }}</ref> | |||
*EMA +ve. | |||
*PR +ve.<ref name=pmid15731902>{{Cite journal | last1 = Einsfelder | first1 = BM. | last2 = Müller | first2 = KM. | title = [Pneumocytoma or sclerosing hemangioma: histogenetic aspects of a rare tumor of the lung]. | journal = Pathologe | volume = 26 | issue = 5 | pages = 367-77 | month = Sep | year = 2005 | doi = 10.1007/s00292-005-0751-8 | PMID = 15731902 }}</ref> | |||
Negative stains:<ref name=pmid10716159/> | |||
*SMA -ve. | |||
*[[CEA]] -ve. | |||
*CD34 -ve. | |||
*S100 -ve. | |||
*Chromogranin A -ve. | |||
Others:<ref name=pmid15138814/> | |||
*[[TTF-1]] +ve. | |||
*HNF-3 alpha +ve. | |||
*HNF-3 beta +ve. | |||
==See also== | |||
*[[Medical lung diseases]]. | |||
*[[Lung tumours]]. | |||
==References== | |||
{{Reflist|2}} | |||
[[Category:Diagnosis]] | [[Category:Diagnosis]] | ||
[[Category:Medical lung diseases]] | |||