Norwegian scabies is a highly contagious skin infestation caused by an ectoparasite, Scarcoptes scabiei var. Hominis, which mainly affects immunosuppressed individuals. Clinically, it may simulate various dermatoses such as psoriasis, Darier's disease, seborrheic dermatitis, among others. This is a case report of a 33-year-old woman, immunocompetent, diagnosed with generalized anxiety disorder (cancer phobia), who had erythematous, well-defined plaques, covered with rupioid crusts, on her neck, axillary folds, breast, periumbilical region, groin area, besides upper back and elbows, mimicking an extremely rare variant of psoriasis, denominated rupioid psoriasis.

Background:Herpetic eczema is a herpetic superinfection of a preexisting skin disease. Hailey-Hailey disease is an autosomal dominant dermatosis that is clinically characterized by flaccid vesicles and rashes in intertriginous areas. The coexistence of those findings is a rare condition; only five cases have been published in literature.Purpose:To report the rare coexistence between Hailey-Hailey disease and herpetic eczema and to highlight the importance of cytology for a quick diagnosis.Case report:A 38-year-old man had been diagnosed with Hailey-Hailey disease for 13 years. His condition evolved into what could be herpetic eczema, which was later confirmed by skin cytology and histopathology. The man showed remission in the infection after 10 days under treatment with acyclovir.Conclusion:Research on the concomitance of infection by the herpes virus must be performed in the exacerbations of Hailey-Hailey disease, and, in those situations, the quick diagnosis through skin cytology makes the early treatment possible.

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Paciente masculino heterossexual de 58 anos com pápulas e placas verrucosas na região perianal e nádegas há um ano. Nega comorbidades e qualquer história pregressa de doença sexualmente transmissível. Exames sorológicos Estudo Laboratorial de Doenças Venéreas, anti-vírus da imunodeficiência humana, HTLV 1 e 2, HBsAg e anti-HVC não reagentes. Realizada biópsia cutânea que demonstrou tipo extremamente raro de poroqueratose de Mibelli na região glútea denominada de poroqueratose piticotrópica. Foi iniciado tratamento com acitretina oral com boa resposta terapêutica. Motivo da apresentação: Doença extremamente rara na região perianal e glútea mimetizando condiloma acuminado por papilomavírus humano.

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