- Epidermoid cyst
Name = PAGENAME
Caption = Epidermal Cyst, ear
DiseasesDB = 29388
ICD10 = ICD10|L|72|0|l|60
ICD9 = ICD9|706.2
OMIM = 131600
eMedicineSubj = derm
eMedicineTopic = 860
MeshID = D004814An 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 infundibularportion 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
bacteriumand form into a pimple-like shape. They are also seen in Gardner's syndromeon the head and neck.
For some individuals, it doesn't even irritate. For others, it can hurt and when touched, it can release
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=]
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]
Sebaceous cyst(since is often mixed up with L72.1)
Wikimedia Foundation. 2010.