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      Retrospective Multicentric Study of 25 Kimura Disease Patients: Emphasis on Therapeutics and Shared Features with Cutaneous IgG4-Related Disease

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          Abstract

          Background: Kimura disease (KD) is a rare lymphoproliferative inflammatory disease of unknown etiology. Data regarding therapeutic modalities and pathophysiology are scarce. Objectives: Analyze therapeutic and follow-up data and compare KD with cutaneous IgG4-related disease (IgG4-RD). Methods: Multicentric retrospective study of 25 KD patients with analysis of treatment, follow-up and IgG4 immunostaining. Comparison with published cases of cutaneous IgG4-RD. Results: Patients were mostly male (84%), median-aged 42 years with lymph node, lacrimal/salivary gland and kidney involvements in 45, 24 and 12%, respectively. Surgical excision had 100% complete response and 60% relapse. Oral corticosteroids had 100% response with 50% relapse. Thalidomide, cyclosporine or interferon-α had 100% response, but 100, 20 and 50% relapse, respectively. KD showed clinicopathological similarities with 27 published cases of cutaneous IgG4-RD. Conclusion: Surgery may be used in resectable KD cases, whereas cyclosporine or thalidomide may represent interesting alternatives to oral corticosteroids in other cases. KD shares features with cutaneous IgG4-RD.

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          Systemic IgG4-related lymphadenopathy: a clinical and pathologic comparison to multicentric Castleman's disease.

          IgG4-related disease sometimes involves regional and/or systemic lymph nodes, and often clinically and/or histologically mimics multicentric Castleman's disease or malignant lymphoma. In this study, we examined clinical and pathologic findings of nine patients with systemic IgG4-related lymphadenopathy. None of these cases were associated with human herpes virus-8 or human immunodeficiency virus infection, and there was no T-cell receptor or immunoglobulin gene rearrangement. Histologically, systemic IgG4-related lymphadenopathy was classified into two types by the infiltration pattern of IgG4-positive cells: interfollicular plasmacytosis type and intra-germinal center plasmacytosis type. The interfollicular plasmacytosis type showed either Castleman's disease-like features or atypical lymphoplasmacytic and immunoblastic proliferation-like features. By contrast, the intra-germinal center plasmacytosis type showed marked follicular hyperplasia, and infiltration of IgG4-positive cells mainly into the germinal centers, and some cases exhibited features of progressively transformed germinal centers. Interestingly, eight of our nine (89%) cases showed eosinophil infiltration in the affected lymph nodes, and examined patients showed high elevation of serum IgE. Laboratory examinations revealed elevation of serum IgG4 and soluble interleukin-2 receptors. However, the levels of interleukin-6, C-reactive protein, and lactate dehydrogenase were within normal limits or only slightly elevated in almost all patients. One patient showed a high interleukin-6 level whereas C-reactive protein was within the normal limit. Autoantibodies were examined in five patients and detected in four. Compared with the previously reported cases of multicentric Castleman's disease, our patients with systemic IgG4-related lymphadenopathy were significantly older and had significantly lower C-reactive protein and interleukin-6 levels. In conclusion, in our systemic IgG4-related lymphadenopathy showed pathologic features only partially overlapping those of multicentric Castleman's disease, and serum data (especially C-reactive protein and interleukin-6) are useful for differentiating the two. Our findings of eosinophil infiltration in the affected tissue and elevation of serum IgE may suggest an allergic mechanism in the pathogenesis of systemic IgG4-related lymphadenopathy.
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            Nephrotic syndrome associated with Kimura disease.

            Kimura disease presents as benign subcutaneous swelling predominantly around the head and neck region. It has a high incidence of renal involvement. However, the pathogenesis of this association remains elusive. Only 2 pediatric cases and 11 adult cases of Kimura disease with renal involvement have been reported in the literature. In recent years many immunopathogenetic features suggesting an underlying T-cell and related cytokine defect have been noted in Kimura disease. We describe a unique case of an Asian boy who presented with nephrotic syndrome resistant to steroid and cytotoxic therapy, and 5 years later developed cervical lymphadenopathy consistent with Kimura disease. We also review the literature, summarizing the presentation, differential diagnosis, incidence of renal disease, prognosis, immunopathogenetic features, and therapy.
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              Lymphadenopathy of IgG4-related disease: an underdiagnosed and overdiagnosed entity.

              Lymphadenopathy is a common occurrence in IgG4-related disease; it can appear before, concurrent with, or after the diagnosis of this disease, which is characterized by tumefactive sclerosing inflammatory lesions predominantly affecting extranodal sites, such as the pancreas, salivary gland, and lacrimal gland. Although multiple lymph node groups are commonly involved, constitutional symptoms are absent. The lymph nodes can show a broad morphologic spectrum, including multicentric Castleman disease-like (type I), follicular hyperplasia (type II), interfollicular expansion (type III), progressive transformation of germinal centers (type IV), and inflammatory pseudotumor-like (type V). All are characterized by an increase in IgG4+ plasma cells (>100 per high power field) and IgG4/IgG ratio (>40%). IgG4-related lymphadenopathy is both an underdiagnosed and overdiagnosed entity. The former is because of the fact that this entity has not been characterized until recently, while the latter results from pathologists' enthusiasm in diagnosing "new" entities and the lack of specificity of the morphologic and immunophenotypic features of IgG4-related lymphadenopathy. It is prudent to render this diagnosis only for patients with known IgG4-related disease or in the presence of corroborating clinical and laboratory findings (such as elderly men, systemic lymphadenopathy, elevated serum IgG4, IgG, and IgE but not IgM and IgA, and low titers of autoantibodies). Outside these circumstances, a descriptive diagnosis of "reactive lymphoid hyperplasia with increased IgG4+ cells" accompanied by a recommendation for follow-up will be appropriate because IgG4-related disease will likely ensue only in a minority of such patients.
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                Author and article information

                Journal
                DRM
                Dermatology
                10.1159/issn.1018-8665
                Dermatology
                S. Karger AG
                1018-8665
                1421-9832
                2015
                November 2015
                10 October 2015
                : 231
                : 4
                : 367-377
                Affiliations
                Départements de aDermatologie et bPathologie, Hôpital Saint-Louis, AP-HP, cDépartement de Dermatologie, Hôpital Pitié-Salpêtrière, AP-HP, Université Pierre et Marie Curie, dDépartement de Pathologie, Hôpital Necker-Enfants Malades, AP-HP, Départements de ePathologie et fDermatologie, Hôpital Bichat, AP-HP, gUniversité Paris-Diderot, Sorbonne Paris-Cité, et hINSERM U1165, Paris, iDépartement de Dermatologie, CHU Hôtel-Dieu, Nantes, and Départements de jDermatologie et kPathologie, Hôpital Henri-Mondor, AP-HP, Créteil, France
                Author notes
                *Maxime Battistella, MD, Pathology Department, Hôpital Saint-Louis, AP-HP, 1, avenue Claude Vellefaux, FR-75010 Paris (France), E-Mail maxime.battistella@sls.aphp.fr
                Author information
                https://orcid.org/0000-0002-5952-8796
                Article
                439346 Dermatology 2015;231:367-377
                10.1159/000439346
                26452023
                424fea1f-f28e-4761-82d1-683611a30067
                © 2015 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                : 16 March 2015
                : 11 August 2015
                Page count
                Figures: 2, Tables: 5, References: 37, Pages: 11
                Categories
                Original Paper

                Oncology & Radiotherapy,Pathology,Surgery,Dermatology,Pharmacology & Pharmaceutical medicine
                Thalidomide,Kimura disease,Pathology,Corticosteroids,Interferon-α,Cyclosporine,IgG4-related disease,Treatment

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