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Dermoid cyst
{{CMG}}{{AE}} {{STM}}


==Overview==
{{Dermoid cyst}}
A '''dermoid cyst''' is a [[teratoma]] that contains developmentally mature [[skin]], with [[hair follicles]] and [[sweat glands]], sometimes luxuriant clumps of long [[hair]], and often pockets of [[sebum]], [[blood]], [[fat]], [[bone]], [[Nail (anatomy)|nails]], [[teeth]], [[eyes]], [[cartilage]], and [[thyroid]] tissue. Because it contains mature tissue, a dermoid cyst almost always is [[benign]]. The rare [[malignant]] dermoid cyst usually develops [[squamous cell carcinoma]].


Some authors use the term dermoid cyst as a frank synonym for teratoma, meaning any teratoma, regardless of its histology or location. Others use it to mean any mature, cystic teratoma.  These uses appear to be most common in gynecology and dermatology.
{{CMG}}; {{AE}} {{STM}}


The term '''dermoid''' is sometimes used to mean dermoid cyst but this is unfortunately vague.
{{SK}} Spinal cutaneous inclusion tumor; Benign cystic teratoma, Ovarian dermoid; Cystic dermoid choristoma of spinal cord; Periorbital dermoid cyst; Intracranial dermoid cyst; Intracranial dermoidcyst; Spinal dermoid cyst; Dermoid cysts of the floor of the mouth; Ectodermal inclusion cyst


==Classification==
==[[Dermoid cyst overview|Overview]]==
===Periorbital Dermoid Cysts===
Dermoid cysts can appear in young children, often near the lateral aspect of the eyebrow (right part of the right eyebrow or left part of the left eyebrow). It often has a rubbery feel. These are sometimes watched and sometimes excised. An inflammatory reaction can occur if the dermoid cyst is disrupted.


Dermoid cysts can recur if not completely excised. Sometimes, complete excision is not practical if in a dumbbell configuration where the cyst extends through a suture line in the skull.
==[[Dermoid cyst historical perspective|Historical Perspective]]==


If the dermoid cysts appear on the medial aspect, the possibility of an [[encephalocele]] becomes greater and should be considered among the differential diagnosis.
==[[Dermoid cyst classification|Classification]]==


==Differentiating Dermoid cysts from other Diseases==
==[[Dermoid cyst pathophysiology|Pathophysiology]]==
* A small dermoid cyst on the head (skull sutures, and midline: sinus, nose, palate, tongue, under the tongue, etc.) or the [[coccyx]] can be difficult to distinguish from a [[pilonidal cyst]]. This is partly because both can be full of hair. A pilonidal cyst is a pilonidal sinus that is obstructed.
 
* Any teratoma near the body surface may develop a sinus or a fistula, or even a cluster of these.  Such is the case of Canadian Football League linebacker Tyrone Jones, whose teratoma was discovered when he blew a tooth out of his nose.<ref>[http://www.theglobeandmail.com/servlet/story/RTGAM.20061116.wsptmaki16/BNStory/GlobeSportsFootball ''Maki: Jones returns to say goodbye'' Globe and Mail, November 16, 2006]</ref>
==[[Dermoid cyst causes|Causes]]==
 
==[[Dermoid cyst differential diagnosis|Differentiating Dermoid cyst from other Diseases]]==
 
==[[Dermoid cyst epidemiology and demographics|Epidemiology and Demographics]]==
 
==[[Dermoid cyst risk factors|Risk Factors]]==
 
==[[Dermoid cyst screening|Screening]]==
 
==[[Dermoid cyst natural history|Natural History, Complications and Prognosis]]==
 
==Diagnosis==
[[Dermoid cyst history and symptoms|History and Symptoms]] | [[Dermoid cyst physical examination|Physical Examination]] | [[Dermoid cyst laboratory tests|Laboratory Findings]] | [[Dermoid cyst x ray|X Ray]] | [[Dermoid cyst CT|CT]] | [[Dermoid cyst MRI|MRI]] | [[Dermoid cyst ultrasound|Ultrasound]] | [[Dermoid cyst other imaging findings|Other Imaging Findings]] | [[Dermoid cyst other diagnostic studies|Other Diagnostic Studies]]


==Treatment==
==Treatment==
*Treatment for dermoid cyst is surgical complete removal, preferably in one piece and without any spillage of cyst contents.  [[Marsupialization]], a surgical technique often used to treat pilonidal cyst, is inappropriate for dermoid cyst due to the risk of malignancy.<ref name="pmid9607423">{{cite journal
[[Dermoid cyst medical therapy|Medical Therapy]] | [[Dermoid cyst surgery|Surgery]] | [[Dermoid cyst cost-effectiveness of therapy|Cost-Effectiveness of Therapy]] | [[Dermoid cyst future or investigational therapies|Future or Investigational Therapies]]
|author=Göbel U, Calaminus G, Engert J, Kaatsch P, Gadner H, Bökkerink JP, Hass RJ, Waag K, Blohm ME, Dippert S, Teske C, Harms D
|title=Teratomas in infancy and childhood.
|journal=Med. Pediatr. Oncol.
|volume=31
|issue=1
|pages=8-15
|year=1998
|pmid=9607423
|doi=
|issn=
}}</ref>


==References==
==References==
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*[[Cyst]]
*[[Cyst]]
*dermoid sinus, more commonly known as a [[pilonidal cyst]]
*dermoid sinus, more commonly known as a [[pilonidal cyst]]
[[de:Dermoidzyste]]
[[it:cisti dermoide]]
[[tr:Dermoid kist]]


[[Category:Dermatology]]
[[Category:Dermatology]]
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Latest revision as of 22:08, 26 November 2017


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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Soujanya Thummathati, MBBS [2]

Synonyms and keywords: Spinal cutaneous inclusion tumor; Benign cystic teratoma, Ovarian dermoid; Cystic dermoid choristoma of spinal cord; Periorbital dermoid cyst; Intracranial dermoid cyst; Intracranial dermoidcyst; Spinal dermoid cyst; Dermoid cysts of the floor of the mouth; Ectodermal inclusion cyst

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Dermoid cyst from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms | Physical Examination | Laboratory Findings | X Ray | CT | MRI | Ultrasound | Other Imaging Findings | Other Diagnostic Studies

Treatment

Medical Therapy | Surgery | Cost-Effectiveness of Therapy | Future or Investigational Therapies

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