IMAGING IN TROPICAL DERMATOLOGY

 

Tinea pseudoimbricata caused by M. gypseum associated to crusted scabies

 

 

Claudia Schermann Poziomczyk^I; Bruna Köche^II; Fabio Luis Becker^III; Sérgio Ivan Torres Dornelles^IV; Renan Rangel Bonamigo^V

^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

 

 

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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

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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

1. Batta K, Ramlogan D, Smith AG, Garrido MC, Moss C. 'Tinea indecisiva' may mimic the concentric rings of tinea imbricata. Br J Dermatol. 2002;147:384.         [ Links ]

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.         [ Links ]

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.         [ Links ]

 

 

Approved by the Editorial Board and accepted for publication on 08.02.2010
Conflict of interest: None
Financial funding: None

 

 

* Work carried out in the Ambulatory Service of Sanitary Dermatology- Porto Alegre (RS), Brazil.