Ann Dermatol.  2010 May;22(2):226-228. 10.5021/ad.2010.22.2.226.

Annular Lupus Vulgaris Mimicking Tinea Cruris

• Heo YS
• Shin WW
• Kim YJ
• Song HJ
• Oh CH

• KMID: 2265402
• DOI: http://doi.org/10.5021/ad.2010.22.2.226

Abstract

Cutaneous tuberculosis is an infrequent form of extrapulmonary tuberculosis. It is often clinically and histopathologically confused with various cutaneous disorders. A 36-year-old man attended our clinic with slowly progressive, asymptomatic, annular skin lesions on both the thighs and buttocks for 10 years. He consulted with many physicians and was improperly treated with an oral antifungal agent for several months under the diagnosis of tinea cruris, but no resolution of his condition was observed. A diagnosis of lupus vulgaris was made based on the histopathologic examination and the polymerase chain reaction assay. Anti-tuberculosis therapy was administered and the lesions started to regress.

Keyword

Lupus vulgaris

MeSH Terms

Adult
Buttocks
Humans
Lupus Vulgaris
Polymerase Chain Reaction
Skin
Thigh
Tinea
Tuberculosis
Tuberculosis, Cutaneous

Figure

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  Fig. 1 (A, B) Well demarcated, irregular bordered, violaceous colored and elevated annular plaques on his groin and buttocks. (C, D) Regression of the lesion with atrophic scarring was observed at the end of treatment.

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  Fig. 2 The biopsy specimen showed acanthosis and irregular papillomatosis of the epidermis. The dermis revealed frequent non-necrotizing epithelioid granulomas, giant cells and a heavy lymphohistiocytic infiltration (H&E, ×40, ×200).

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