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IgG4-Related Disease in the Head and Neck
Introduction Background IgG4-related disease (IgG4-RD) is a relatively recently recognized fibroinflammatory condition of unknown etiology characterized by elevated serum IgG4, plasmacytic infiltration, multifocal tumefactive fibrosis, and clinical improvement by steroid therapy. The association between autoimmune (sclerosing) pancreatitis and elevated serum…