Tinea Corporis | Figure 4.22
A: Tinea corporis
B: Tinea corporis
C: Majocchi’s granuloma, leg
D: Majocchi’s granuloma, hand |
(Figure 4.22A–D) - T. rubrum most common; may spread from fungal infection of feet (T. rubrum, T. mentagrophytes), infected animal (M. canis), or soil (M. gypseum)
- Presents as erythematous, sharply marginated, scaly plaque with raised, advancing border; typically with central clearing and annular or arcuate shape
- Clinical variants
- Tinea imbricata: T. concentricum, presents with distinct scaly plaques arranged in concentric rings
- Tinea profunda: marked inflammatory response to a dermatophyte (analogous to kerion on scalp)
- Tinea incognito: dermatophyte infection without obvious signs of inflammation (usually due to prior treatment with topical corticosteroid)
- Majocchi’s granuloma: T. rubrum (most common), granulomatous folliculitis due to dermatophyte entering hair follicles (usually due to prior topical corticosteroid use), treat with oral antifungal
- Treatment: topical therapy usually adequate (imidazole, allylamine); if extensive or involving hair follicles can use oral terbinafine or itraconazole
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