Difference between revisions of "Dermal cysts"

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Dermal cysts (view source)

Revision as of 00:43, 18 December 2013

1,535 bytes removed ,  00:43, 18 December 2013
→‎Pilar cyst: split out
(→‎Pilar cyst: split out)
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==Pilar cyst==
==Pilar cyst==
*[[AKA]] ''trichilemmal cyst''.
*[[AKA]] ''trichilemmal cyst''.
===General===
{{Main|Pilar cyst}}
*Very common.
 
===Gross===
*Classic location: head ~90%.<ref>URL: [http://emedicine.medscape.com/article/1058907-overview http://emedicine.medscape.com/article/1058907-overview]. Accessed on: 15 April 2012.</ref>
 
===Microscopic===
Features:<ref name=Ref_Derm309>{{Ref Derm|309}}</ref>
*Keratin.
*Cyst lining:
**Has no granular layer - '''key feature'''.
***Keratohyaline granules (as seen in the granular layer) may be seen focally.
**Inner most cyst lining cells are large cells with abundant eosinophilic cytoplasm.
 
DDx:
*[[Epidermal cyst]] - has a granular layer.
 
====Images====
<gallery>
Image:Trichilemmal_cyst_-_intermed_mag.jpg | Trichilemmal cyst - intermed. mag. (WC)
Image:Trichilemmal_cyst_-_very_high_mag.jpg | Trichilemmal cyst - very high mag. (WC)
</gallery>
www:
*[http://dermatlas.med.jhmi.edu/derm/indexDisplay.cfm?ImageID=69966366 Trichilemmal cyst (dermatlas.med.jhmi.edu)].
*[http://www.flickr.com/photos/40764007@N08/3881846034/in/photostream/ Trichilemmal cyst (flickr.com)].
===Sign out===
<pre>
SCALP (CYST), EXCISION:
- TRICHILEMMAL CYST (PILAR CYST).
</pre>
 
<pre>
SKIN CYST, LEFT FLANK, EXCISION:
- TRICHILEMMAL CYST (PILAR CYST).
</pre>
 
<pre>
SCALP (CYST), ANTERIOR, EXCISION:
- TRICHILEMMAL CYST (PILAR CYST), RUPTURED.
</pre>
====Micro====
The sections show a cyst that is lined by squamous epithelium without a granular layer. Focally, keratohyaline granules are seen in the cyst lining cells. The innermost cyst lining cells are large and have abundant eosinophilic cytoplasm. The cyst contains keratin.


==Dermoid cyst==
==Dermoid cyst==
Michael
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