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Immunoglobin G4-related disease (IgG4-RD) is a rare fibro-inflammatory disease of unknown etiology that has been recently recognized. It can cause fibro-inflammatory masses in almost every organ of the body and is associated with dense lymphoplasmacytic infiltration of IgG4-postitive plasma cells, storiform fibrosis and elevated levels of serum IgG4.1 IgG4-RD is a systemic disease that may…
A Spotlight on IgG4-Related Disease
What rheumatologists need to know about identifying and diagnosing immunoglobulin G4-related disease (IgG4-RD)
Macrophage Activation Syndrome
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New Criteria Released for Macrophage Activation Syndrome in Juvenile Idiopathic Arthritis
Although most systemic juvenile idiopathic arthritis patients don’t develop macrophage activation syndrome (MAS), the approximately 10% who do have this serious complication can experience widespread, massive inflammation, debilitating symptoms and even death. To improve understanding of MAS among physicians and advance efforts to develop effective therapies to treat it, a panel of 28 international pediatric…