Epidermoid cyst

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List of terms related to Epidermoid cyst

	Epidermoid cyst;
	Epidermal Cyst, ear
ICD-10	L72.0
ICD-9	706.2
OMIM	131600
DiseasesDB	29388
eMedicine	derm/860
MeSH	D004814

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

Overview

An epidermoid cyst is a benign cyst, developed out of ectodermal tissue. Histologically, it is made of a thin layer of squamous epithelium.

It's very common for women and can be found on the major or minor labia.

Terminology

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,^[1] yet technically incorrect, use of these two terms.

Causes

These cysts are caused by a bacterium and form into a pimple-like shape.

Presentation

It's very common for women and can be found on the major or minor labia. For some individuals, it doesn't even irritate. For others, it can hurt and when touched, it can release pus. If any of this occurs, its best to discuss it with a doctor.

In contrast to pilar cysts, epidermoid cysts usually present on parts of the body with relatively little hair.^[2]

Although they are not malignant, it is possible for malignant tumors to arise from them.^[3]

Diagnosis

MRT isointens, FLAIR hyperintens.

Physical Examination

Skin

Face

Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]
Epidermoid cyst. Adapted from Dermatology Atlas.^[4]

Extremity

Epidermoid cyst. Adapted from Dermatology Atlas.^[4]

Treatment

Cysts can be removed by excision.^[5]

References

↑ "Epidermoid cyst".
↑ "cysts - British Association of Dermatologists".
↑ Jehle KS, Shakir AJ, Sayegh ME (2007). "Squamous cell carcinoma arising in an epidermoid cyst". British journal of hospital medicine (London, England : 2005). 68 (8): 446. PMID 17847698.
↑ ^4.00 ^4.01 ^4.02 ^4.03 ^4.04 ^4.05 ^4.06 ^4.07 ^4.08 ^4.09 ^4.10 ^4.11 ^4.12 ^4.13 ^4.14 "Dermatology Atlas".
↑ "Minimal Excision Technique for Removal of an Epidermoid Cyst - April 1, 2002 - American Academy of Family Physicians".

External links

Template:DermNet

de:Epidermoidzyste nl:epidermoïd cyste

Template:WikiDoc Sources

[1] "Epidermoid cyst".

[2] "cysts - British Association of Dermatologists".

[pmid17847698-3] Jehle KS, Shakir AJ, Sayegh ME (2007). "Squamous cell carcinoma arising in an epidermoid cyst". British journal of hospital medicine (London, England : 2005). 68 (8): 446. PMID 17847698.

[Dermatology_Atlas-4] 4.00 ^4.01 ^4.02 ^4.03 ^4.04 ^4.05 ^4.06 ^4.07 ^4.08 ^4.09 ^4.10 ^4.11 ^4.12 ^4.13 ^4.14 "Dermatology Atlas".

[5] "Minimal Excision Technique for Removal of an Epidermoid Cyst - April 1, 2002 - American Academy of Family Physicians".

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[2]

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v t e Diseases of the skin and subcutaneous tissue (integumentary system) (L, 680-709)
Infections	Template:Navbox subgroup
Bullous disorders	acantholysis (Pemphigus, Transient acantholytic dermatosis) · Pemphigoid (Bullous, Cicatricial, Gestational) · Dermatitis herpetiformis
Inflammatory	Template:Navbox subgroup
Radiation-related disorders	Sunburn · actinic rays (Actinic keratosis, Actinic cheilitis) · Polymorphous light eruption (Acne aestivalis) · Radiodermatitis · Erythema ab igne
Pigmentation disorder	hypopigmentation (Albinism, Vitiligo) · hyperpigmentation (Melasma, Freckle, Café au lait spot, Lentigo/Liver spot, Acanthosis nigricans, Acral acanthotic anomaly)
Other skin	keratosis/hyperkeratosis (Seborrheic keratosis, Callus) · other epidermal thickening (Ichthyosis acquisita, Palmoplantar keratoderma) skin ulcer (Pyoderma gangrenosum, Bedsore) Cutaneous Markers of Internal Malignancy (Florid cutaneous papillomatosis, acanthosis nigricans, sign of Leser-Trelat) atrophic (Lichen sclerosus, Acrodermatitis chronica atrophicans) necrobiosis (Granuloma annulare, Necrobiosis lipoidica) · other granuloma (Granuloma faciale, Pyogenic granuloma) cutaneous vasculitis (Livedoid vasculitis, Erythema elevatum diutinum)
Connective tissues	collagen disease: Keloid localized connective tissue disorders: Lupus erythematosus (Discoid lupus erythematosus, Subacute cutaneous lupus erythematosus) · Scleroderma/Morphea · Linear scleroderma · Calcinosis cutis · Sclerodactyly · Ainhum
see also congenital, neoplasia