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→Cholesteatoma
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*The etiology is ''not'' well understood.<ref name=pmid20860924>{{Cite journal | last1 = Nevoux | first1 = J. | last2 = Lenoir | first2 = M. | last3 = Roger | first3 = G. | last4 = Denoyelle | first4 = F. | last5 = Ducou Le Pointe | first5 = H. | last6 = Garabédian | first6 = EN. | title = Childhood cholesteatoma. | journal = Eur Ann Otorhinolaryngol Head Neck Dis | volume = 127 | issue = 4 | pages = 143-50 | month = Sep | year = 2010 | doi = 10.1016/j.anorl.2010.07.001 | PMID = 20860924 }}</ref><ref name=pmid20156369>{{Cite journal | last1 = Louw | first1 = L. | title = Acquired cholesteatoma pathogenesis: stepwise explanations. | journal = J Laryngol Otol | volume = 124 | issue = 6 | pages = 587-93 | month = Jun | year = 2010 | doi = 10.1017/S0022215109992763 | PMID = 20156369 }}</ref> | *The etiology is ''not'' well understood.<ref name=pmid20860924>{{Cite journal | last1 = Nevoux | first1 = J. | last2 = Lenoir | first2 = M. | last3 = Roger | first3 = G. | last4 = Denoyelle | first4 = F. | last5 = Ducou Le Pointe | first5 = H. | last6 = Garabédian | first6 = EN. | title = Childhood cholesteatoma. | journal = Eur Ann Otorhinolaryngol Head Neck Dis | volume = 127 | issue = 4 | pages = 143-50 | month = Sep | year = 2010 | doi = 10.1016/j.anorl.2010.07.001 | PMID = 20860924 }}</ref><ref name=pmid20156369>{{Cite journal | last1 = Louw | first1 = L. | title = Acquired cholesteatoma pathogenesis: stepwise explanations. | journal = J Laryngol Otol | volume = 124 | issue = 6 | pages = 587-93 | month = Jun | year = 2010 | doi = 10.1017/S0022215109992763 | PMID = 20156369 }}</ref> | ||
**Theories include migration/hyperplasia, and metaplasia.<ref name=pmid20156369/> | **Theories include migration/hyperplasia, and metaplasia.<ref name=pmid20156369/> | ||
*Rarely transforms into [[squamous cell carcinoma]].<ref name=pmid19563937>{{Cite journal | last1 = Rothschild | first1 = S. | last2 = Ciernik | first2 = IF. | last3 = Hartmann | first3 = M. | last4 = Schuknecht | first4 = B. | last5 = Lütolf | first5 = UM. | last6 = Huber | first6 = AM. | title = Cholesteatoma triggering squamous cell carcinoma: case report and literature review of a rare tumor. | journal = Am J Otolaryngol | volume = 30 | issue = 4 | pages = 256-60 | month = | year = | doi = 10.1016/j.amjoto.2008.06.011 | PMID = 19563937 }}</ref> | |||
====Classification==== | |||
May be subdivided into:<ref name=pmid20860924/> | May be subdivided into:<ref name=pmid20860924/> | ||
*Acquired - due to trauma, surgery or infection. | *Acquired - due to trauma, surgery or infection. | ||
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DDx: | DDx: | ||
*Cholesterol granuloma.<ref>URL: [http://path.upmc.edu/cases/case273/dx.html http://path.upmc.edu/cases/case273/dx.html]. Accessed on: 14 January 2012.</ref> | *Cholesterol granuloma.<ref>URL: [http://path.upmc.edu/cases/case273/dx.html http://path.upmc.edu/cases/case273/dx.html]. Accessed on: 14 January 2012.</ref> | ||
*[[Squamous cell carcinoma]].<ref name=pmid19563937/> | |||
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