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A Case of Tinea Incognito Presented like Furunculosis

Tae Young Han,Yong Kwan Rho,Seong Jun Seo,Chang Kwun Hong,Kye Yong Song
Epub 2016 February 18

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Abstract



Tinea incognito is a dermatophytosis of atypical clinical character due to the absence of classic features of ringworm.

It is caused by prolonged use of topical or systemic corticosteroids, sometimes prescribed as a result of incorrect diagnosis. We report a case of tinea incognito presented like furunculosis on the chin. The patient had been treated 

with topical and oral corticosteroid under the impression of atopic dermatitis for 3 years for the eczematous lesion on the face and trunk. Mycologic studies including KOH mount and fungus culture were positive for hyphae and colonies

of Trichophyton rubrum. Skin biopsy showed fungal hyphae in follicular keratinous plug and diffuse dermal and perifollicular inflammation. The lesion was treated with terbinafine systemically and cured 3 months later.



Keywords


Tinea incognito Trichophyton rubrum Furunculosis




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