Difference between revisions of "Dermal cysts"
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*[http://www.flickr.com/photos/santoshpath/4788590105/in/photostream/ Steatocystoma - low mag. (flickr.com)]. | *[http://www.flickr.com/photos/santoshpath/4788590105/in/photostream/ Steatocystoma - low mag. (flickr.com)]. | ||
*[http://www.flickr.com/photos/santoshpath/4788590109/ Steatocystoma - high mag. (flickr.com)]. | *[http://www.flickr.com/photos/santoshpath/4788590109/ Steatocystoma - high mag. (flickr.com)]. | ||
==Dermoid cyst== | |||
===General=== | |||
*Benign. | |||
*Congenital [[choristoma]]s.<ref name=dc_uiowa>Gandhi N, Syed NA, Alen R. Dermoid Cyst. EyeRounds.org. posted July 26, 2010; Available from: [http://www.EyeRounds.org/cases/115-dermoid-cyst.htm http://www.EyeRounds.org/cases/115-dermoid-cyst.htm]. Accessed on: 22 September 2011.</ref> | |||
*May be found in the [[ovary]]. | |||
===Microscopic=== | |||
Features:<ref name=dc_uiowa>Gandhi N, Syed NA, Alen R. Dermoid Cyst. EyeRounds.org. posted July 26, 2010; Available from: [http://www.EyeRounds.org/cases/115-dermoid-cyst.htm http://www.EyeRounds.org/cases/115-dermoid-cyst.htm]. Accessed on: 22 September 2011.</ref><ref name=Ref_PCPBoD8_596>{{Ref PCPBoD8|596}}</ref> | |||
*Cyst lined by normal (keratinized) skin with adnexal structure (hair follicles, sweat glands, sweat ducts). | |||
DDx: | |||
*[[Epidermal cyst]] - no adnexal structures. | |||
Images: | |||
*[http://webeye.ophth.uiowa.edu/eyeforum/cases-i/case115/larger/Figure3.jpg Dermoid cyst - low mag. (uiowa.edu)].<ref name=dc_uiowa>Gandhi N, Syed NA, Alen R. Dermoid Cyst. EyeRounds.org. posted July 26, 2010; Available from: [http://www.EyeRounds.org/cases/115-dermoid-cyst.htm http://www.EyeRounds.org/cases/115-dermoid-cyst.htm]. Accessed on: 22 September 2011.</ref> | |||
*[http://webeye.ophth.uiowa.edu/eyeforum/cases-i/case115/larger/Figure4.jpg ]. | |||
==See also== | ==See also== | ||
Revision as of 17:24, 22 September 2011
Dermal cysts are common in dermatopathology. Dermatopathologists can diagnose 'em.
Cysts
Common types:[1]
- Epidermal cyst (sebaceous cyst) -- most common.
- Pilar (trichilemmal) cyst.
- Dermoid cyst.
- Ganglion cyst.
- Milicem.
Epidermal necrosis
- This may be cystic. It is covered in the epidermal necrosis article, which covers erythema multiforme, Steven-Johnson syndrome and toxic epidermal necrolysis.
Venous lake
- Dilated vein.
Microscopic
Features:[2]
- Lined by endothelium.
- Blood in lumen.
- +/-Fibrin in lumen.
DDx:
- Angiokeratoma.
- Ectatic superficial dermal vessels.
- Irregular acanthosis.
- Longer rete ridges.
Epidermal inclusion cyst
- AKA epidermal cyst.
General
- Very common.
Microscopic
Features:
- Cyst lining has a granular layer - key feature.[3]
- Trapped collagen bundles at edge of lesion with surrounded by fibroblasts.
- Keratin.
Image:
DDx:
- Dermatofibrosarcoma - if lesion is large.
- Pilar cyst - no granular layer.
- Eccrine hidrocystoma - eyelid lesion; same histology.[4]
Pilar cyst
- AKA trichilemmal cyst.
General
- Very common.
Microscopic
Features:
- Keratin.
- Cyst lining has no granular layer - key feature.
- Trapped collagen bundles at edge of lesion with surrounded by fibroblasts.
DDx:
- Epidermal cyst - has a granular layer.
Steatocystoma
General
- Benign.
- Typically adults.
- Usually on the trunk.
Microscopic
Features:[5]
- Cyst lined by squamous epithelium with:
- Corrugated eosinophilic lining - key feature.
- Similar appearance to compact keratin (hyperkeratosis).
- No granular cell layer.
- Corrugated eosinophilic lining - key feature.
Images:
Dermoid cyst
General
- Benign.
- Congenital choristomas.[6]
- May be found in the ovary.
Microscopic
- Cyst lined by normal (keratinized) skin with adnexal structure (hair follicles, sweat glands, sweat ducts).
DDx:
- Epidermal cyst - no adnexal structures.
Images:
![[1]](http://webeye.ophth.uiowa.edu/eyeforum/cases-i/case115/larger/Figure4.jpg){kind=link}
See also
References
- ↑ TN07 D5
- ↑ Weedon's Skin Pathology. 3rd Ed. P.895.
- ↑ URL: http://emedicine.medscape.com/article/1058907-diagnosis. Accessed on: 18 March 2011.
- ↑ Adams, SP. (Feb 1999). "Dermacase. Eccrine hydrocystoma.". Can Fam Physician 45: 297, 306. PMC 2328272. PMID 10065300. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2328272/.
- ↑ Busam, Klaus J. (2009). Dermatopathology: A Volume in the Foundations in Diagnostic Pathology Series (1st ed.). Saunders. pp. 312. ISBN 978-0443066542.
- ↑ 6.0 6.1 6.2 Gandhi N, Syed NA, Alen R. Dermoid Cyst. EyeRounds.org. posted July 26, 2010; Available from: http://www.EyeRounds.org/cases/115-dermoid-cyst.htm. Accessed on: 22 September 2011.
- ↑ Mitchell, Richard; Kumar, Vinay; Fausto, Nelson; Abbas, Abul K.; Aster, Jon (2011). Pocket Companion to Robbins & Cotran Pathologic Basis of Disease (8th ed.). Elsevier Saunders. pp. 596. ISBN 978-1416054542.