Tinea corporis = سعفة الجسد

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Tinea Corporis (Tinea Circinata)

Tinea corporis refers to all dermatophytoses of glabrous skin except the palms, soles, and groin.

EPIDEMIOLOGY

Tinea corporis may be transmitted directly from infected humans or animals, via fomites, or via autoinoculation from reservoirs such as T. rubrum colonization of the feet. Children are more likely to contract zoophilic pathogens, especially M. canis from dogs or cats. Occlusive clothing and a warm, humid climate are associated with more frequent and severe eruptions.

The occlusive clothing, frequent skin-to-skin contact, and minor trauma (mat burns) of competitive wrestling create an environment in which dermatophytes flourish. Numerous outbreaks of “tinea corporis gladiatorum” have resulted, mostly caused by T. tonsurans.

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Tinea corporis = سعفة الجسد
Tinea corporis2
Tinea corporis3
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Variants of Tinea Capitis

NAME		ETIOLOGY	CLINICAL DESCRIPTION
Noninflammatory
	Tinea circinata	Any dermatophyte (usually Trichophyton rubrum, T. mentagrophytes, Microsporum canis)	Annular lesions with central clearing and an active, spreading border
	Bullous tinea corporis	Usually T. rubrum	Spongiotic or sub-corneal vesicles/pustules; may be herpetiform
	Tinea imbricata	T. concentricum	Widespread; multiple concentric, polycyclic scaly lesions with minimal inflammation
Inflammatory
	Kerion of glabrous skin	Zoophilic organisms	Similar to kerion of scalp or beard
	Majocchi granuloma	T. rubrum, T. violaceum, T. tonsurans, T. mentagrophytes	Perifollicular, granulomatous nodules mostly on the scalps of children; often without pustulation, and associated with underlying disease
	Nodular granulomatous perifolliculitis of the legs	T. rubrum	Variant of Majocchi granuloma affecting the lower two-thirds of women's legs; unilateral; T. rubrum is also present on the nails and feet
	Agminate folliculitis	Zoophilic organisms	Well-defined erythematous plaques studded with perifollicular pustules
	Subcutaneous abscess (tinea profunda)	T. mentagrophytes, T. violaceum, T. tonsurans, T. rubrum, M. audouinii	Deep subcutaneous nodules are present; rarely with lymph node involvement or hematogenous spread
	Mycetoma	M. audouinii, M. canis, M. ferrugineum, T. mentagrophytes, T. tonsurans, T. violaceum, T. verrucosum	Subcutaneous masses
	Tinea faciale	Usually Trichophyton species, occasionally M. canis	3%-4% of tinea corporis, erythematous, scaly plaques with or without active borders; telangiectasia, atrophy, and photo-exacerbation may mimic lupus erythematosus
	Tinea incognito	Any dermatophyte infection modified by glucocorticoids	Atypical with possible absence of inflammation, scaling, or symptoms; dermal nodules or kerion-like lesions may be present

Tinea imbricata, caused by T. concentricum, clinically appears as a plaque consisting of concentric erythematous rings. It is largely limited to areas of the Far East, South Pacific, and South and Central America.

ETIOLOGY

Although any dermatophyte can cause tinea corporis, the most common cause is T. rubrum. T. mentagrophytes, M. canis, and T. tonsurans are also common pathogens.³ T. rubrum and T. verrucosum are the most likely candidates in cases with additional follicular involvement.²⁸ Tinea imbricata is caused by T. concentricum.

CLINICAL FINDINGS

The classic presentation is an annular lesion with scale across the entire erythematous border. The border is often vesicular and advances centrifugally. The center of the lesion is usually scaly but may exhibit clearing. Lesions may be serpiginous and annular . Concentric vesicular rings suggest tinea incognito caused by T. rubrum, whereas the concentric rings of tinea imbricata demonstrate little to no vesiculation. T. rubrum infections may also present as large,

confluent polycyclic or psoriasiform plaques .

Majocchi granuloma is an infection usually caused by T. rubrum, which occurs when fungal hyphae invade hairs and hair follicles. It is classically seen in women who shave their legs and appears as inflamed folliculocentric papules.

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