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generic term for inflammatory conditions of the skin; particularly with vesiculation in the acute stages

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/04/15 21:09:01」(JST)

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Nummular dermatitis (also known as "Discoid eczema,"^[1] "Microbial eczema,"^[1] "Nummular eczema,"^[2] and "Nummular neurodermatitis"^[2]^:82) is one of the many forms of dermatitis. Also known as discoid dermatitis, it is characterized by round or oval-shaped itchy lesions. (The name comes from the Latin word "nummus," which means "coin.")

Presentation

The disorder is recurrent and chronic, and may appear at any age, although it is most common in people in their 60's. Nummular dermatitis does not appear to be a genetic condition, is not related to food allergies, and is not contagious.

The coin-shaped patches can affect any part of the body, but the legs and buttocks are the most common areas. Flare-ups are associated with dry skin, so the winter season is a particularly bad time for those with this condition.

Other forms of dermatitis are at risk of developing.^[3]

Other causes

Nummular eczema can also be worsened by stress and excessive caffeine, which dehydrates the body and thus the skin.^{[citation needed]}

Treatment

One of the keys to treatment and prevention involves keeping the skin moisturized. Lotions, creams, and bath oils may help prevent an outbreak. If the condition flares up, a common treatment involves the application of topical corticosteroids. Oral antihistamines may help lessen itching. More severe cases sometimes respond to ultraviolet light treatment.

References

^ ^a ^b Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN 1-4160-2999-0.
^ ^a ^b James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. ISBN 0-7216-2921-0.
^ Krupa Shankar DS, Shrestha S (2005). "Relevance of patch testing in patients with nummular dermatitis". Indian journal of dermatology, venereology and leprology 71 (6): 406–8. doi:10.4103/0378-6323.18945. PMID 16394482.

External links

http://hardinmd.lib.uiowa.edu/dermnet/eczema6.html
http://library.med.utah.edu/kw/derm/pages/desy_23.htm
http://www.dermnet.com/Eczema-Nummular/ - Photo gallery on dermnet.com

UpToDate Contents

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English Journal

Nummular eczema and contact allergy: a retrospective study.

Bonamonte D, Foti C, Vestita M, Ranieri LD, Angelini G.SourceFrom the Department of Internal Medicine and Clinical Oncology-Section of Dermatology, University of Bari Medical School, Bari, Italy.
Dermatitis : contact, atopic, occupational, drug : official journal of the American Contact Dermatitis Society, North American Contact Dermatitis Group.Dermatitis.2012 Jul;23(4):153-7.
BACKGROUND: Etiopathogenesis of nummular eczema is obscure; many causative factors have been proposed. Only a few studies investigated the relevance of contact allergy.OBJECTIVE: This retrospective study aimed to investigate the role of contact allergy in the underlying mechanism of nummular eczema.
PMID 22828253

Skin diseases in rural Yucatan, Mexico.

Paek SY, Koriakos A, Saxton-Daniels S, Pandya AG.SourceDepartment of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
International journal of dermatology.Int J Dermatol.2012 Jul;51(7):823-8. doi: 10.1111/j.1365-4632.2011.05190.x.
OBJECTIVES: There are no known reports of the frequency of skin diseases endemic to rural Yucatan, Mexico. The aim of this study was to report the prevalence of dermatologic conditions in rural villages in that region.METHODS: We conducted a retrospective descriptive study of all cases of skin disea
PMID 22715826