Abstract: The classification of cutaneous lymphomas is multidisciplinary and requires the correlation between clinical, histopathological, immunohistochemical, and molecular diagnostic elements. In this article, we present four different cases of CD30-positive T-cell lymphoma with cutaneous manifestations. We compare cases with definitive diagnosis of papulosis lymphomatoid type C, primary cutaneous anaplastic ...
Abstract Woolly hair nevus is a rare condition characterized by a structural anomaly of the hair, restricted to certain areas of the scalp. The hair becomes coiled and slightly hypopigmented. The term woolly hair refers to changes that affect all the scalp and has a hereditary character. We present a case of woolly hair nevus, that developed at the age of 2 years, associated with dental diastema and verrucous e...
Abstract The use of tumor necrosis factor antagonists (anti-TNF) has become a usual practice to treat various inflammatory diseases. Although indicated for the treatment of psoriasis, anti-TNF may paradoxically trigger a psoriasiform condition. We present a case of a female patient who, during the use of infliximab for rheumatoid arthritis, developed psoriasis. In an attempt to switch anti-TNF class, we observe...
Abstract Childhood linear immunoglobulin A dermatosis is a rare autoimmune vesiculobullous disease. It results in linear deposition of autoantibodies (immunoglobulin A) against antigens in the basal membrane zone, leading to subepidermal cleavage. Additional depositions of immunoglobulin G and complement-3 might occur. It is still debated whether concomitant findings of immunoglobulins A and G should be conside...
We report the case of an 11-year-old male patient with a histopathological and immunohistochemical diagnosis of dermatofibroma with an atypical clinical presentation on the right forearm. Although dermatofibroma is considered a benign skin tumor, some of its differential diagnoses, such as dermatofibrosarcoma protuberans and malignant fibrous histiocytoma, are truly aggressive. Lesions with atypical clinical as...
Linear IgA dermatosis has been increasingly associated with inflammatory bowel diseases, particularly ulcerative colitis. A 13-year-old male patient with an 11-month history of ulcerative colitis developed vesicles, pustules and erosions on the skin of the face, trunk and buttocks and in the oral mucosa. The work-up revealed a neutrophil-rich sub-epidermal bullous disease and linear deposition of IgA along the ...
The authors report a case of ectopic cutaneous schistosomiasis in a 35 year-old female who presented clustered reddish macules and papules on the left buttock. The diagnosis was not suspected during clinical evaluation and required visualization of Schistosoma mansoni eggs on sections of tissue.
A dermatite seborreica é uma doença eritêmato-escamativa de caráter crônico-recidivante que acomete entre 1 e 3% da população geral dos Estados Unidos. Possui dois picos de incidência - o primeiro, durante os três primeiros meses de vida, e o segundo, a partir da puberdade, atingindo seu ápice entre os 40 e 60 anos de idade. Os indivíduos HIV positivos têm maior prevalência da doença, que apresenta maior intens...
O carcinoma de células escamosas pigmentado é variedade rara de carcinoma de células escamosas, havendo apenas 13 casos de localização na pele relatados na literatura inglesa, cinco na literatura latino-americana e nenhum caso na brasileira. Neste trabalho, os autores relatam um caso de carcinoma de células escamosas pigmentado da pele, destacando os aspectos clínicos, histopatológicos e imuno-histoquímicos.
O perineurioma esclerosante é uma neoplasia benigna rara,constituída exclusivamente por células com diferenciação perineural, dispersas em meio a estroma fibroso denso. Acomete preferencialmente a pele dos quirodáctilos e das regiões palmares e se apresenta como pápula ou nódulo firme, normocrômico e assintomático. Apresentamos um caso de perineurioma esclerosante localizado na região palmar esquerda de uma pac...