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IgG4-related disease for the hematologist.
Hematology Am Soc Hematol Educ Program
December 2024
Division of Hematology, University of British Columbia, Vancouver, British Columbia, Canada; and Division of Hematology, Dalhousie University, Halifax, Nova Scotia, Canada.
Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated disease with many important manifestations in hematopoietic and lymphoid tissue. IgG4 is the least naturally abundant IgG subclass, and the hallmark feature of IgG4-RD is markedly increased IgG4-positive plasma cells (with an IgG4 to IgG ratio >40%) in affected tissue, along with elevated polyclonal serum IgG and IgG4 in most patients. Histological diagnosis is essential, and other key features include storiform fibrosis, lymphoplasmacytic infiltrate, tissue eosinophilia, and obliterative phlebitis.
View Article and Find Full Text PDFTuberculous meningitis associated with the absence of pleocytosis in cerebrospinal fluid in an immunocompetent patient: A case report.
IJID Reg
December 2024
Infectious Diseases Department, Ibn Rochd University Hospital Center, Faculty of Medicine and Pharmacy, HASSAN II University of Casablanca, Casablanca, Morocco.
We report a case of tuberculous meningitis without pleocytosis of the cerebrospinal fluid (CSF) in a 27-year-old patient admitted for a meningeal syndrome with signs of basilar involvement and an infectious syndrome associated with a hacking cough with whitish sputum and night sweats, evolving for 15 days before her admission, in a context of weight loss of 2 kg, asthenia, and anorexia. Cytobacteriological and chemical analysis of the CSF revealed less than 3 cells/mm white blood cells, high protein levels of 2.54 g/l, and low glucose levels of 0.
View Article and Find Full Text PDFLymphadenopathy in systemic lupus erythematosus: no microbial trigger found by shotgun metagenomics in a retrospective study on 38 patients.
Rheumatology (Oxford)
October 2024
Sorbonne Université, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, centre national de référence pour le lupus, le syndrome des anticorps anti-phospholipides et autres maladies auto-immunes rares, Service de Médecine Interne 2, Institut E3M, Paris, France.
Objectives: Lymphadenopathy is a classical manifestation of systemic lupus erythematosus (SLE) flare, occurring in approximately half of patients during the course of the disease. Lymphadenopathy in SLE is frequently associated with fever. Microbial infection may play a role in SLE onset and flares.
View Article and Find Full Text PDFImpact of Infections During Pregnancy on Transplacental Antibody Transfer.
Vaccines (Basel)
October 2024
Department of Obstetrics and Gynecology, University of Washington, Seattle, WA 98109, USA.
Article Synopsis
- * Certain pathogens, like HIV, malaria, and SARS-CoV-2, can hinder the transfer of these protective antibodies from mother to child, affecting neonatal health.
- * The review highlights changes in antibody characteristics, maternal immune responses, and placental damage as factors that impact antibody transfer, stressing the importance of understanding these processes for better pandemic preparedness and child health outcomes.
Misleading antigenic von Willebrand factor levels in acquired von Willebrand syndrome secondary to monoclonal gammopathy of undetermined significance.
Int J Hematol
January 2025
Department of Laboratory Medicine, Nagoya University Hospital, Nagoya, Japan.
In the diagnosis and treatment of acquired von Willebrand syndrome (AVWS), von Willebrand factor (VWF) antigen levels (VWF:Ag) are helpful for quantifying blood VWF-protein levels. Most clinical laboratories measure VWF:Ag by latex immunoassay (LIA), but underlying diseases of AVWS may influence LIA results. A 60 year-old AVWS patient with immunoglobulin G (IgG) kappa-type monoclonal gammopathy of undetermined significance (MGUS) showed reduced VWF activity but normal levels of VWF:Ag.
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