Monday, September 7, 2009

Tinea Versicolor

Tinea versicolor is a common skin infection caused by Malassezia furfur. It is characterized by multiple circular small patches, often coalesce to form large patches. The patches are asymptomatic, covered with powdery scales, varying in color from white to brown.

Malassezia furfur is a dimorphic fungus , present on skin as a normal skin flora but in some people it causes infection called tinea versicolor. The prevalence of Tinea versicolor is high in young adults suggesting link to increased secretion of sebum; other risk factors includes heat and humid climate, increase sweat and immunosuppression either due to corticosteroids, HIV and other diseases.

Symptoms and Signs

Tinea versicolor is usually asymptomatic, rarely causes mild irritation following sweating. Classically, it appears as multiple tan, brown or white scaling lesions at the hair follicle, on the trunk, neck, abdomen, and occasionally face. The lesions coalesce and form large patches. It is commonly encountered in the summer months .


Appearance of the lesion
Potassium hydroxide(KOH) wet mount
Wood's light examination

Topical antifungals ( Ketoconazole)
Oral antifungals

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