Immunoglobulin G4-Related Disease

Immunoglobulin G4-related disease (IgG4-RD) is an emerging immunemediated fibro-inflammatory disorder which can involve any organ. The main characteristics of IgG4-RD are increased serum IgG4 concentration, abundant IgG4+ plasma cells in affected tissues, and painless swollen organs often without general symptoms. Typical pathology features of IgG4-RD are lymphoplasmacytic infiltration, dense storiform fibrosis, and obliterative pheblitis. The...