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Dermatophyte infections mimicking other skin diseases: a 154-person case survey of tinea atypica in the district of Cagliari (Italy).
Int J Dermatol 2012; 51(4):410-5IJ

Abstract

BACKGROUND

Although usually simple, the diagnosis of dermatophyte infection is sometimes neglected. An observational study has been realized to evaluate the role of corticosteroid exposure (tinea incognito) and of other primary characteristics of the dermatophytosis that from onset mimic other diseases and mislead an unexperienced physician.

MATERIALS AND METHODS

Between 1990 and 2009, all cases of atypical dermatophytosis mimicking other skin diseases were collected from the more general number of dermatophyte infections diagnosed at the Dermatology Department of Cagliari University, Italy.

RESULTS

One-hundred and fifty-four cases (71 male/83 female, 2-81 years old) were studied, with a median of 7 cases/year. The most observed clinical forms were those mimicking impetigo, eczematous dermatitis, lupus erythematosus, polymorphous light eruption, psoriasis, and rosacea. The identified dermatophytes were: Microsporum canis (70 cases), Trichophyton rubrum (43 cases), Trichophyton mentagrophytes var. mentagrophytes (29 cases), Trichophyton mentagrophytes var. interdigitale (six cases), Microsporum gypseum (three cases), Epidermophyton floccosum (two cases), and Trichophyton verrucosum (one case). Diagnostic difficulties are discussed, with special attention to the origin of the pathomorphosis.

CONCLUSIONS

In our experience, clinical atypia is not a mere consequence of corticosteroid therapy but present at the very onset of the illness, due to the variable dermatophyte invasive capacity, the site of invasion, physiological individual, and/or acquired condition, such as excessive washing or sun exposure. Therefore, we suggest using the term "tinea atypica" rather than "tinea incognito" to include all forms of dermatophytosis that do not present the classic features for both primary and secondary pathomorphosis.

Authors+Show Affiliations

Dermatology Department, Cagliari University, Italy. laura.atzori@libero.itNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22435428

Citation

Atzori, Laura, et al. "Dermatophyte Infections Mimicking Other Skin Diseases: a 154-person Case Survey of Tinea Atypica in the District of Cagliari (Italy)." International Journal of Dermatology, vol. 51, no. 4, 2012, pp. 410-5.
Atzori L, Pau M, Aste N, et al. Dermatophyte infections mimicking other skin diseases: a 154-person case survey of tinea atypica in the district of Cagliari (Italy). Int J Dermatol. 2012;51(4):410-5.
Atzori, L., Pau, M., Aste, N., & Aste, N. (2012). Dermatophyte infections mimicking other skin diseases: a 154-person case survey of tinea atypica in the district of Cagliari (Italy). International Journal of Dermatology, 51(4), pp. 410-5. doi:10.1111/j.1365-4632.2011.05049.x.
Atzori L, et al. Dermatophyte Infections Mimicking Other Skin Diseases: a 154-person Case Survey of Tinea Atypica in the District of Cagliari (Italy). Int J Dermatol. 2012;51(4):410-5. PubMed PMID: 22435428.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dermatophyte infections mimicking other skin diseases: a 154-person case survey of tinea atypica in the district of Cagliari (Italy). AU - Atzori,Laura, AU - Pau,Monica, AU - Aste,Natalia, AU - Aste,Nicola, PY - 2012/3/23/entrez PY - 2012/3/23/pubmed PY - 2012/7/31/medline SP - 410 EP - 5 JF - International journal of dermatology JO - Int. J. Dermatol. VL - 51 IS - 4 N2 - BACKGROUND: Although usually simple, the diagnosis of dermatophyte infection is sometimes neglected. An observational study has been realized to evaluate the role of corticosteroid exposure (tinea incognito) and of other primary characteristics of the dermatophytosis that from onset mimic other diseases and mislead an unexperienced physician. MATERIALS AND METHODS: Between 1990 and 2009, all cases of atypical dermatophytosis mimicking other skin diseases were collected from the more general number of dermatophyte infections diagnosed at the Dermatology Department of Cagliari University, Italy. RESULTS: One-hundred and fifty-four cases (71 male/83 female, 2-81 years old) were studied, with a median of 7 cases/year. The most observed clinical forms were those mimicking impetigo, eczematous dermatitis, lupus erythematosus, polymorphous light eruption, psoriasis, and rosacea. The identified dermatophytes were: Microsporum canis (70 cases), Trichophyton rubrum (43 cases), Trichophyton mentagrophytes var. mentagrophytes (29 cases), Trichophyton mentagrophytes var. interdigitale (six cases), Microsporum gypseum (three cases), Epidermophyton floccosum (two cases), and Trichophyton verrucosum (one case). Diagnostic difficulties are discussed, with special attention to the origin of the pathomorphosis. CONCLUSIONS: In our experience, clinical atypia is not a mere consequence of corticosteroid therapy but present at the very onset of the illness, due to the variable dermatophyte invasive capacity, the site of invasion, physiological individual, and/or acquired condition, such as excessive washing or sun exposure. Therefore, we suggest using the term "tinea atypica" rather than "tinea incognito" to include all forms of dermatophytosis that do not present the classic features for both primary and secondary pathomorphosis. SN - 1365-4632 UR - https://www.unboundmedicine.com/medline/citation/22435428/Dermatophyte_infections_mimicking_other_skin_diseases:_a_154_person_case_survey_of_tinea_atypica_in_the_district_of_Cagliari__Italy__ L2 - https://doi.org/10.1111/j.1365-4632.2011.05049.x DB - PRIME DP - Unbound Medicine ER -