Mycoses

Tinea corporis is a superficial fungal infection involving glabrous skin that is caused by the invasion and proliferation of dermatophytes in the stratum corneum. Tinea corporis classically manifests as asymptomatic or itchy, single or few, erythematous, circular, or annular scaly plaques that often display central clearing giving rise to an expanding ring-like lesion and a well-demarcated margin that may be papular, pustular, or vesicular. The term trichophytic Majocchi granuloma refers to a deep follicular involvement with perifollicular granulomatous/fibrotic reaction that manifests as a solitary or multiple persistent papulopustules or crusted plaques. Tinea capitis is the most common paediatric dermatophyte infection worldwide, with a particular predilection for black populations. Pityriasis versicolour in skin of colour usually presents as round or oval macules coalescing into larger patches that most commonly involve the upper chest/back. Tinea nigra is clinically typified by a single or multiple brown or black patches on the palms and/or soles.