Tinea corporis (body ringworm)

[Michiko]

Tinea corporis is a dermatophyte infection of the face, trunk, and extremities. Diagnosis is by clinical appearance and by examination of skin scrapings on potassium hydroxide wet mount. Treatment involves topical or oral antifungals.
Tinea corporis is a dermatophytosis that causes pink-to-red annular (O-shaped) patches and plaques with raised scaly borders that expand peripherally and tend to clear centrally. A rare variant form appears as nummular (circle- or round-shaped) scaling patches studded with small papules or pustules that have no central clearing. Common causes are Trichophyton mentagrophytes, T. rubrum, and Microsporum canis.