Korean J Med Mycol.  2008 Sep;13(3):138-141.

A Case of Tinea Incognito Presented like Furunculosis

Affiliations
  • 1Department of Dermatology, College of Medicine, Chung-Ang University, Korea. drseo@hanafos.com
  • 2Department of Pathology, College of Medicine, Chung-Ang University, Korea.

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.

Keyword

Tinea incognito; Trichophyton rubrum; Furunculosis

MeSH Terms

Adrenal Cortex Hormones
Biopsy
Chin
Dermatitis, Atopic
Fungi
Furunculosis
Humans
Hyphae
Inflammation
Keratins
Naphthalenes
Skin
Tinea
Trichophyton
Adrenal Cortex Hormones
Keratins
Naphthalenes
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