IgG4-related disease
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IgG4-related disease (IgG4-RD), formerly known as IgG4-related systemic disease, is a chronic inflammatory condition characterized by tissue infiltration with lymphocytes and IgG4-secreting plasma cells, various degrees of fibrosis (scarring) and a usually prompt response to oral steroids. In approximately 51–70% of people with this disease, serum IgG4 concentrations are elevated during an acute phase.[1][2][3]
IgG4-related disease | |
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Other names | IgG4-related systemic disease |
Low power view of IgG4-related prostatitis. The prostatic stroma shows a dense inflammatory infiltrate and fibrosis (H&E, 100x) | |
Specialty | Immunology/Rheumatology |
It is a relapsing-remitting disease associated with a tendency to mass forming, tissue-destructive lesions in multiple sites, with a characteristic histopathological appearance in whichever site is involved. Inflammation and the deposition of connective tissue in affected anatomical sites can lead to organ dysfunction, organ failure, or even death if not treated.[4]
Early detection is important to avoid organ damage and potentially serious complications.[5] Treatment is recommended in all symptomatic cases of IgG4-RD and also in asymptomatic IgG4-RD involving certain anatomical sites.[4][6]