Affiliation:
1. Respiratory Medicine Unit, Department of Medicine, Solna and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital, Solna, Stockholm, Sweden
2. Both the authors contributed equally to this article.
3. Interstitial Lung Diseases Center of Excellence, Department of Pulmonology, St. Antonius Hospital, Nieuwegein, The Netherlands
4. Shared senior authorship.
Abstract
AbstractLöfgren's syndrome (LS), first described in 1946 by Swedish Professor of Medicine Sven Löfgren, is a clinically distinct phenotype of sarcoidosis. Patients typically experience an acute disease onset, usually with fever, and characteristic symptoms of bilateral hilar lymphadenopathy, erythema nodosum, and/or bilateral ankle arthritis or periarticular inflammation. LS patients are well documented to have a good prognosis, which is especially true for HLA-DRB1*03+ individuals. The presence of this allele correlates closely with an accumulation of clonal CD4+ T-cell populations in the lung, suggestive of local antigen recognition. Moreover, LS differs markedly from “non-LS” sarcoidosis regarding immune cell activation, differentiation, and regulation, which may influence clinical outcome and spontaneous disease resolution.This review offers an overview of the clinical characteristics, genetic background, and immunological characteristics of LS, as well as patient management, and reflections on future scientific challenges, emphasizing the concept of LS as a disease in its own right.
Subject
Critical Care and Intensive Care Medicine,Pulmonary and Respiratory Medicine
Cited by
34 articles.
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