Epidermoid cyst

Epidermoid cyst


Caption = Epidermal Cyst, ear
DiseasesDB = 29388
ICD10 = ICD10|L|72|0|l|60
ICD9 = ICD9|706.2
OMIM = 131600
MedlinePlus =
eMedicineSubj = derm
eMedicineTopic = 860
MeshID = D004814
An epidermoid cyst is a benign cyst, developed out of ectodermal tissue. Histologically, it is made of a thin layer of squamous epithelium.

It is very common for women on the major or minor labia.


The more general term for an Epidermal Inclusion Cyst (which strictly means implantation of epidermal elements into the dermis), Epidermoid cyst includes cysts originating from the infundibular portion of the hair follicle.

The majority of Epidermal Inclusion Cysts do in fact originate from the infundibular portion of the hair follicle thus explaining the interchangeable, [cite web |url=http://www.meddean.luc.edu/lumen/MEdEd/Medicine/dermatology/melton/cyst10.htm |title=Epidermoid cyst |accessdate=2007-11-14 |format= |work=] yet technically incorrect, use of these two terms.


These cysts are caused by a bacterium and form into a pimple-like shape. They are also seen in Gardner's syndrome on the head and neck.


For some individuals, it doesn't even irritate. For others, it can hurt and when touched, it can release pus.

In contrast to pilar cysts, epidermoid cysts usually present on parts of the body with relatively little hair. [cite web |url=http://www.bad.org.uk/patients/leaflets/cysts.asp |title=cysts - British Association of Dermatologists |accessdate=2007-11-14 |format= |work=]

Although they are not malignant, it is possible for malignant tumors to arise from them.cite journal |author=Jehle KS, Shakir AJ, Sayegh ME |title=Squamous cell carcinoma arising in an epidermoid cyst |journal=British journal of hospital medicine (London, England : 2005) |volume=68 |issue=8 |pages=446 |year=2007 |pmid=17847698 |doi=]


MRT isointens, FLAIR hyperintens.


Cysts can be removed by excision. [cite journal |author= |title=Minimal excision technique for removal of an epidermoid cyst |journal=Am Fam Physician |volume=65 |issue=7 |pages=1423–4 |year=2002 |pmid=11996427 |doi= |url=http://www.aafp.org/afp/20020401/1423ph.html]

ee also

*Sebaceous cyst (since is often mixed up with L72.1)


External links


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Look at other dictionaries:

  • epidermoid cyst — n a cystic tumor containing epidermal or similar tissue called also epidermoid see CHOLESTEATOMA * * * see sebaceous cyst * * * 1. epidermal c. 2. a benign tumor in the skull, meninges, or brain, formed by inclusion of epidermal elements,… …   Medical dictionary

  • epidermoid cyst — noun or epidermoid : a cystic tumor containing epidermal or similar tissue see cholesteatoma; compare dermoid cyst …   Useful english dictionary

  • epidermoid cyst — see sebaceous cyst …   The new mediacal dictionary

  • epidermoid tumor — epidermoid cyst (def. 2) …   Medical dictionary

  • Cyst — This article is about cysts in the body. For the ICAO airport code CYST, see St. Theresa Point Airport. For hard shelled resting stages of some small organisms, see Microbial cyst. Cyst Classification and external resources …   Wikipedia

  • epidermoid — 1. Resembling epidermis. 2. A cholesteatoma or other cystic tumor arising from aberrant epidermal cells. [epidermis + G. eidos, appearance] * * * epi·der·moid dər .mȯid adj resembling epidermis or epidermal cells: made up of elements like those… …   Medical dictionary

  • epidermoid — adjective Date: 1836 resembling epidermis or epidermal cells ; made up of elements like those of epidermis < an epidermoid cyst > …   New Collegiate Dictionary

  • Киста Эпидермоидная (Epidermoid Cyst) — см. Киста сальной железы. Источник: Медицинский словарь …   Медицинские термины

  • Cyst — A closed sac or capsule, usually filled with fluid or semisolid material. * * * 1. A bladder. 2. An abnormal sac containing gas, fluid, or a semisolid material, with a membranous lining. SEE ALSO: pseudocyst. [G. kystis, bladder] adventitious c.… …   Medical dictionary

  • Sebaceous cyst — Infobox Disease Name = PAGENAME Caption = DiseasesDB = 29388 ICD10 = ICD10|L|72|1|l|60 ICD9 = ICD9|706.2 ICDO = OMIM = MedlinePlus = 000842 eMedicineSubj = eMedicineTopic = MeshID = D004814A sebaceous cyst (a form of trichilemmal cyst) is a… …   Wikipedia

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