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      Hiperplasia angiolinfoide como causa de eosinofilia Translated title: Angiolymphoid hyperplasia as the cause of eosinophilia

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          Abstract

          A hiperplasia angiolinfoide (Hale e doença de Kimura são duas entidades que podem se manifestar como nódulos, placas ou pápulas, de localização predominante em face, região retroauricular e cervical. São causas raras de eosinofilia e ainda há muita discussão em torno de suas etiopatogenias. Para alguns autores trata-se de duas patologias distintas enquanto para outros são manifestações diferentes da mesma doença. O presente artigo relata o caso de um paciente asiático que apresentava história de prurido generalizado há um ano, acompanhado de pápulas em membros e nódulo de aproximadamente 5 cm de diâmetro em região retroauricular direita com aumento progressivo. O hemograma apresentava leucocitose às custas de eosinofilia. Os achados sugerem uma superposição entre as duas patologias, pois clinicamente são sugestivos de doença de Kimura, mas a histopatologia e imuno-histoquímica confirmaram a origem endotelial da lesão, sendo compatível com Hale. Os autores destacam a raridade do caso como causa de eosinofilia, assim como alertam para a dificuldade do diagnóstico e da diferenciação entre as duas patologias.

          Translated abstract

          Angiolymphoid hyperplasia (Hale) and Kimura disease are two entities that can manifest as subcutaneous nodules, plaques, or papules, and the predominant localization is face, retroauricular and cervical region. They are rare causes of eosinophilia and there is discussion regarding their etiopathogenesis. Some authors propose that these two diseases are truly individual, but others say that they are separate points on a single spectrum. This article is a case report of an asian patient that showed a one year duration of generalized pruritus, with papules on the limbs and a 5 centimeter nodule on the right retroauricular region with slow progression of the size. The hemogram showed leucocitosis with eosinophilia. These findings suggest an overlap between these two diseases, they are clinically suggestive of Kimura disease diagnosis, but the histopathology with HE and immunohistochemistry confirmed the endothelial origin of the lesion that was compatible with Hale. The authors emphasize the rarity of the case as the cause of eosinophilia, also alert for the challenge of the diagnosis and distinction between these two diseases.

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          Eosinophilic disorders.

          Eosinophilic inflammatory responses occur in association with multiple disorders. Although the initial cause and the affected organs vary among the different eosinophilic disorders, there are only 2 major pathways that mediate eosinophilia: (1) cytokine-mediated increased differentiation and survival of eosinophils (extrinsic eosinophilic disorders), and (2) mutation-mediated clonal expansion of eosinophils (intrinsic eosinophilic disorders). Independent from the original trigger, the most common cause of eosinophilia is the increased generation of IL-5-producing T cells. In some cases, tumor cells are the source of eosinophil hematopoietins. The intrinsic eosinophilic disorders are characterized by mutations in pluripotent or multipotent hematopoietic stem cells leading to chronic myeloid leukemias with eosinophils as part of the clone. Here, we propose a new classification of eosinophilic disorders on the basis of these obvious pathogenic differences between the 2 groups of patients. We then discuss many known eosinophilic disorders, which can be further subdivided by differences in T-cell activation mechanisms, origin of the cytokine-producing tumor cell, or potency of the mutated stem cell. Interestingly, many subgroups of patients originally thought to have the idiopathic hypereosinophilic syndrome can be integrated in this classification.
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            SUBCUTANEOUS ANGIOLYMPHOID HYPERPLASIA WITH EOSINOPHILIA

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              Kimura's disease and angiolymphoid hyperplasia with eosinophilia: two distinct histopathological entities.

              The relationship between the disorder known in Japanese and Chinese literature as Kimura's disease and that known in Western literature as angiolymphoid hyperplasia with eosinophilia (ALHE) has been the subject of debate. Many reports have used the terms synonymously. We have reviewed the histological and clinical features of 4 cases, all occurring in Caucasians, 2 of which are typical of Kimura's disease and 2 of ALHE. Analysis of the cases indicates that the histological features of the 2 disorders are sufficiently different to warrant their recognition as 2 distinct entities. The histological and clinical features of Kimura's disease are most consistent with an allergic or autoimmune process in which blood vessels, lymphocytes and eosinophils participate. Those of ALHE suggest a primary, probably neoplastic disorder of vascular endothelium with a variable and secondary inflammatory response. Although there is some clinical overlap between patients with the 2 disorders, the histological features are distinctive, and the 2 terms should not be used synonymously.
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                Author and article information

                Journal
                rbhh
                Revista Brasileira de Hematologia e Hemoterapia
                Rev. Bras. Hematol. Hemoter.
                Associação Brasileira de Hematologia e Hemoterapia e Terapia Celular (São Paulo, SP, Brazil )
                1516-8484
                1806-0870
                2009
                : 31
                : 6
                : 477-480
                Affiliations
                [01] São Paulo SP orgnameCentro de Hematologia de São Paulo
                [02] São Paulo SP orgnamePathos Diagnósticos Médicos
                Article
                S1516-84842009000600019 S1516-8484(09)03100619
                70601360-d24d-4db0-b55c-86a2b3ba3a9a

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 08 May 2009
                : 08 July 2009
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 4
                Product

                SciELO Brazil

                Self URI: Texto completo somente em PDF (PT)
                Categories
                Relato de Caso

                hiperplasia angiolinfoide com eosinofilia,angiolymphoid hyperplasia with eosinophilia,doença de Kimura,Eosinophilia,Kimura disease,Eosinofilia

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