Tinea pseudoimbricata caused by M. gypseum associated to crusted scabies

Poziomczyk, Claudia Schermann; Köche, Bruna; Becker, Fabio Luis; Dornelles, Sérgio Ivan Torres; Bonamigo, Renan Rangel

doi:10.1590/S0365-05962010000400022

Abstracts

Tinea pseudoimbricata is related to T. tonsurans and T. rubrum and crusted scabies is a highly contagious dermatosis caused by excessive proliferation of S. scabiei var. hominis. We described a case of a 21-year-old patient, seronegative for HIV, with both skin diseases. The occurrence of these dermatosis simultaneously in immunocompetent patients is very rare.

Microsporum; Scabies; Tinea

Tinea pseudoimbricata é relacionada ao T. tonsurans e ao T. rubrum e a escabiose crostosa é uma dermatose altamente contagiosa, ocasionada pela proliferação excessiva do S. scabiei var. hominis. Descrevemos uma paciente com 21 anos, soronegativa para HIV, apresentando ambas doenças dermatológicas. O encontro simultâneo destas dermatoses em pacientes imunocompetentes é muito raro.

Escabiose; Microsporum; Tinha

IMAGING IN TROPICAL DERMATOLOGY

^IMedical Doctor, Dermatologist - Porto Alegre (RS), Brazil

^IIMedical Doctor, Dermatologist - Porto Alegre (RS), Brazil

^IIIMedical Doctor, Dermatologist - Porto Alegre (RS), Brazil

^IVMaster Degree in Clinical Medicine from the Federal University of Rio Grande do Sul (UFRGS) - Preceptor of the Medical Internship in Dermatology in the Ambulatory Service of Sanitary Dermatology - Porto Alegre (RS), Brazil

^VMaster and Doctorate Degrees in Clinical Medicine from the Federal University of Rio Grande do Sul (UFRGS) - Preceptor of the Medical Internship in Dermatology in the Ambulatory Service of Sanitary Dermatology - Porto Alegre (RS),Brazil

ABSTRACT

Tinea pseudoimbricata is related to T. tonsurans and T. rubrum and crusted scabies is a highly contagious dermatosis caused by excessive proliferation of S. scabiei var. hominis. We described a case of a 21-year-old patient, seronegative for HIV, with both skin diseases. The occurrence of these dermatosis simultaneously in immunocompetent patients is very rare.

Keywords: Microsporum; Scabies; Tinea

Tinea Pseudoimbricata presents itself as annular plaques that form parallel and imbricated concentric rings similar to Tinea Imbricata,¹ being caused by T. tonsurans and T. rubrum. ^2,3 Crusted scabies is a variation of the parasitosis caused by S. scabiei var. hominis, with atypical crusted lesions and excessive proliferation of acarids. It is described the case of a 21-year-old patient with pruriginous lesions who had been suffering from the disease for two months. The patient presented large area with squamous papule-erythematous lesions, in annular dispositions (^{Picture 1}) and imbricated keratotic nodules on the trunk and lower limbs. (^Picture2). The direct mycotic exam showed long and ramose mycelial filaments, and the search for Sarcoptes scabiei, various parasites per field (^{Picture 3}). The culture showed growth of Microsporum gypseum. Laboratorial exams were normal and the viral serologies were non-reagent. It is a unique clinical case of association between a rare type of dermatophytosis and crusted scabies.

REFERENCES

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2. Lim SP, Smith AG. "Tinea pseudoimbricata": tinea corporis in a renal transplant recipient mimicking the concentric rings of tinea imbricate. Clin Exp Dermatol. 2003;28:332-3.
3. Ouchi T, Nagao K, Hata Y, Otuka T, Inazumi T. Tricophyton tonsurans infection manifesting as multiple concentric annular erythemas. J Dermatol. 2005;32:565-8.