Erythrasma

Erythrasma
Classification and external resources
Specialty	dermatology
ICD-10	L08.1
ICD-9-CM	039.0
DiseasesDB	29630
MedlinePlus	001470
eMedicine	derm/140
MeSH	D004894
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Erythrasma is a skin disease that causes brown, scaly skin patches. It is caused by the Gram-positive bacterium Corynebacterium minutissimum. It is prevalent among diabetics and the obese, and in warm climates; it is worsened by wearing occlusive clothing.

The patches of erythrasma are initially pink, but progress quickly to become brown and scaly (as skin starts to shed), which are classically sharply demarcated. Erythrasmic patches are typically found in intertriginous areas (skin fold areas—e.g. armpit, groin, under breast). The slightly webbed spaces between toes (or other body region skin folds) can be involved, making it difficult to distinguish from various Tinea. The patient is commonly otherwise asymptomatic.

It is caused by the Gram-positive bacterium Corynebacterium minutissimum.

The diagnosis can be made on the clinical picture alone. However, a simple side-room investigation with a Wood's lamp is additionally useful in diagnosing erythrasma. The ultraviolet light of a Wood's lamp causes the organism to fluoresce a characteristic coral red color, differentiating it from other skin conditions such as tinea versicolor, which may fluoresce a copper-orange color.

Erythrasma is treated with topical fusidic acid, or systemic macrolides (erythromycin or azithromycin).

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