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      Histiocitose de células de Langerhans: doença de Letterer-Siwe - importância do diagnóstico dermatológico em dois casos Translated title: Langerhans cell histiocytosis: Letterer-Siwe disease - the importance of dermatological diagnosis in two cases

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          Abstract

          A histiocitose de células de Langerhans é proliferação clonal de células fenotipicamente semelhantes às células de Langerhans. Anteriormente denominada Letterer-Siwe, é a forma mais comum e mais grave dessa enfermidade, acometendo sobretudo crianças até os dois anos de idade. São apresentados dois casos dessa rara doença, diagnosticados após parecer dermatológico, destacando-se seus aspectos mais característicos.

          Translated abstract

          Langerhans cell histiocytosis is defined as a clonal proliferation of Langerhans phenotypic-like cells. Letterer-Siwe disease is the most common and serious of these entities, affecting mainly infants up to two years of age. We present two cases of this rare disease, diagnosed after dermatological examination, highligthing its typical aspects.

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          Dermatologia

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            Clinical spectrum of cutaneous Langerhans' cell histiocytosis mimicking various diseases.

            Langerhans' cell histiocytosis summarizes a spectrum of diseases on the basis of histogenetic criteria. These are characterized by an accumulation of cells with Langerhans' cell phenotype in one or multiple organs. Up to 50% of patients with either single or multi-organ manifestation of Langerhans' cell histiocytosis initially present with cutaneous symptoms. Nevertheless, cutaneous Langerhans' cell histiocytosis is rare and heterogeneous in its clinical features and therefore prone to misdiagnosis. We report on five patients, two infants and three adults, suffering from cutaneous Langerhans' cell histiocytosis, either singly or as part of multi-organ disease. The different skin features morphologically mimicking other entities are shown and the differential diagnoses are discussed. The correct diagnosis in all presented cases is based on immunohistological examination, showing a histiocytic infiltrate positively staining with anti-S100 antibodies, CD1a and--apart from one case--with CD207 (langerin).
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              Histiocitose de células de Langerhans: O papel do sistema imunológico na sua etiopatogenia

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                abd
                Anais Brasileiros de Dermatologia
                An. Bras. Dermatol.
                Sociedade Brasileira de Dermatologia (Rio de Janeiro )
                1806-4841
                August 2009
                : 84
                : 4
                : 405-409
                Affiliations
                [1 ] Santa Casa de Misericórdia de Vitória Brazil
                [2 ] Sociedade Brasileira de Dermatologia
                [3 ] Hospital Infantil Nossa Senhora da Glória Brasil
                [4 ] Sociedade Brasileira de Dermatologia
                [5 ] Santa Casa de Misericórdia de Vitória Brazil
                [6 ] Santa Casa de Misericórdia de Vitória Brazil
                [7 ] Hospital Infantil Nossa Senhora da Glória Brasil
                [8 ] Santa Casa de Misericórdia de Vitória Brazil
                Article
                S0365-05962009000400013
                10.1590/S0365-05962009000400013
                60d5dd1f-d707-42d2-8c48-64941238f53c

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0365-0596&lng=en
                Categories
                DERMATOLOGY

                Dermatology
                Antigen-presenting cells,Etoposide,Immunohistochemistry,Microscopy,electron,Vinblastine,Células apresentadoras de antígenos,Etoposídeo,Imunoistoquímica,Microscopia eletrônica,Vimblastina

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