An Bras Dermatol. 2010;85(4):558-9. ▲ Tinea pseudoimbricata caused by M. gypseum associated to crusted scabies Tinea pseudoimbricata por M. gypseum associada à escabiose crostosa Claudia Schermann Poziomczyk 1 Bruna Köche 2 Fabio Luis Becker 3 Sérgio Ivan Torres Dornelles 4 Renan Rangel Bonamigo 5 Abstract:Tinea pseudoimbricata is related to T. tonsurans and T. rubrum and crusted scabies is a high- ly 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 der- matosis simultaneously in immunocompetent patients is very rare. Keywords: Microsporum; Scabies; Tinea Resumo: 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 dermatoló- gicas. O encontro simultâneo destas dermatoses em pacientes imunocompetentes é muito raro. Palavras-chave: Escabiose; Microsporum; Tinha Approved by the Editorial Board and accepted for publication on 08.02.2010 . * Work carried out in the Ambulatory Service of Sanitary Dermatology- Porto Alegre (RS), Brazil. Conflict of interest: None / Conflito de interesse: Nenhum Financial funding: None / Suporte financeiro: Nenhum 1 Medical Doctor, Dermatologist - Porto Alegre (RS), Brazil 2 Medical Doctor, Dermatologist - Porto Alegre (RS), Brazil 3 Medical Doctor, Dermatologist - Porto Alegre (RS), Brazil 4 Master 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. 5 Master 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. ©2010 by Anais Brasileiros de Dermatologia 558 IMAGING IN TROPICAL DERMATOLOGY Tinea Pseudoimbricata presents itself as annu- lar plaques that form parallel and imbricated concen- tric 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 PICTURE 1: Squamous papule-erythe- matous lesions in annular dis- positions on the dorsum of the patient; (bellow): lesion highly enlarged