Unusual Manifestation of Immunoglobulin G4-Related Disease Involving the Retroperitoneum: A Case Report
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Immunoglobulin G4 (IgG4)-related disease is a systemic disease characterized by dense lymphoplasmacytic infiltrates with abundant IgG4-positive plasma cells and fibroblast proliferation. The retroperitoneal involvement of IgG4-related disease usually appears a... ...
