Polyclonal hyperviscosity syndrome (HVS) is rare and has been reported in various disorders of immune dysregulation and lymphoid hyperplasia. IgG4-Related Disease (IgG4-RD) is an emerging disorder often associated with exuberant hypergammaglobulinemia, and this review of seven cases establishes IgG4-RD as an important cause of polyclonal HVS.
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http://dx.doi.org/10.1002/ccr3.201 | DOI Listing |
Cureus
October 2024
Rheumatology, Royal Free London NHS Foundation Trust, London, GBR.
Immunoglobulin G4 (IgG4)-related disease is a rare multi-system immune-mediated inflammatory condition. Pathologically, it is associated with an increase in plasma IgG4 levels and tissue infiltration of IgG4-secreting plasma cells of any organ. Clinical features vary, but it usually presents with the diffuse enlargement and dysfunction of the affected organ.
View Article and Find Full Text PDFClin Chem Lab Med
August 2024
Department of Laboratory Medicine, Department of Hematology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
Objectives: Monoclonal gammopathies frequently associate with hemostatic alterations. Thrombotic events occur with high incidence particularly upon treatment, while in rarer cases hemorrhagic diathesis can be observed. The pathology of these tendencies could be caused by thrombocytopenia or hyperviscosity burden of circulating monoclonal antibodies.
View Article and Find Full Text PDFGerms
June 2021
MD, PhD, Prof., University of Zagreb School of Medicine, Clinical Department for Clinical and Molecular Microbiology, University Hospital Center Zagreb, Kišpatić Street 12, Zagreb, Croatia.
Introduction: Recently, a marked increase in the rate of colistin resistant was observed in Croatian hospitals and the outpatient setting. This prompted us to analyze the molecular epidemiology of these isolates and the mechanisms of spread.
Methods: In total 46 colistin-resistant isolates from five hospitals and the community were analyzed.
Lancet Haematol
May 2021
Division of Hematology, University of British Columbia, Vancouver, BC, Canada; Centre for Health Education Scholarship, University of British Columbia, Vancouver, BC, Canada; Department of Medicine, Vancouver General Hospital, Vancouver, BC, Canada. Electronic address:
This Review outlines a practical approach to assessing and managing polyclonal hypergammaglobulinaemia in adults. Polyclonal hypergammaglobulinaemia is most commonly caused by liver disease, immune dysregulation, or inflammation, but can also provide an important diagnostic clue of rare diseases such as histiocyte disorders, autoimmune lymphoproliferative syndrome, Castleman disease, and IgG4-related disease. Causes of polyclonal hypergammaglobulinaemia can be divided into eight categories: liver disease, autoimmune disease and vasculitis, infection and inflammation, non-haematological malignancy, haematological disorders, IgG4-related disease, immunodeficiency syndromes, and iatrogenic (from immunoglobulin therapy).
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