摘要: Lymphadenopathy is frequently observed in patients with immunoglobulin G4-related disease (IgG4-RD) and sometimes appears as the first manifestation of disease. The diagnosis IgG4-related lymphadenopathy complicated owing to a great histological diversity, at least 5 subtypes. Indeed, lymph node biopsy may be performed under suspicion that malignant lymphoma or other lymphoproliferative disorder. IgG4-RD characterized by both elevated serum IgG4 (>135?mg/dL) histopathological features, including dense lymphoplasmacytic infiltrate rich