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Revision as of 15:45, 18 January 2017

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→‎Eccrine hidrocystoma: split out
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==Eccrine hidrocystoma==
==Eccrine hidrocystoma==
*Occasionally spelled ''eccrine hydrocystoma''.<ref name=pmid10065300/>
*Occasionally spelled ''eccrine hydrocystoma''.<ref name=pmid10065300/>
===General===
{{Main|Eccrine hidrocystoma}}
*Benign.
*Eyelid lesion.
 
Clinical DDx:<ref name=pmid10065300/>
*Cystic [[BCC]].
 
===Microsopic===
Features:<ref name=pmid15205675>{{Cite journal  | last1 = Singh | first1 = AD. | last2 = McCloskey | first2 = L. | last3 = Parsons | first3 = MA. | last4 = Slater | first4 = DN. | title = Eccrine hidrocystoma of the eyelid. | journal = Eye (Lond) | volume = 19 | issue = 1 | pages = 77-9 | month = Jan | year = 2005 | doi = 10.1038/sj.eye.6701404 | PMID = 15205675 }}</ref><ref>{{Ref Derm|314}}</ref>
*Cyst lined by a bland bilayer.
**Inner lining cells have:
***Small, round nuclei - usu. basal.
***Moderate pale/greyish cytoplasm.
***No apocrine snouts - flat surface.
**Outer lining cells - spindled.
***May be difficult to see.
 
Note:
*According to the CMAJ, it has the histology of an [[epidermal inclusion cyst]].<ref name=pmid10065300>{{Cite journal  | last1 = Adams | first1 = SP. | title = Dermacase. Eccrine hydrocystoma. | journal = Can Fam Physician | volume = 45 | issue =  | pages = 297, 306 | month = Feb | year = 1999 | doi =  | PMID = 10065300 |PMC = 2328272 }}</ref>
 
DDx:
*[[Apocrine hidrocystoma]] - have apocrine snouts; surface is ''not'' flat.
*Cystadenoma - has epithelial proliferation.
 
====Image====
<gallery>
Image:SkinTumors-P7110453.JPG | Apocrine hidrocystoma (AH). AH looks similar to ''eccrine hidrocystoma''. (WC)
</gallery>
www:
*[http://www.nature.com/eye/journal/v19/n1/fig_tab/6701404f1.html Eccrine hidrocystoma (nature.com)].
*[http://www.dermnet.org.nz/pathology/apocrine-hidrocystoma-path.html Apocrine hidrocystoma (dermnet.org)].
*[http://www.flickr.com/photos/42574434@N03/9519309216 Apocrine hidrocystoma (flickr.com)].
 
===Sign out===
<pre>
SKIN LESION, ADJACENT TO RIGHT EYELID, EXCISION:
- ECCRINE HIDROCYSTOMA.
</pre>
 
====Micro====
The sections show hair bearing skin with a cyst lined by a bland bilayered epithelium.  The predominant lining cell has moderate pale grey cytoplasm and a small round nucleus. 
 
The lesion is excised in the plane of section.


==Chalazion==
==Chalazion==
Michael
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