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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.
Type 1 AIP is now regarded as a manifestation of IgG4-related disease, [2] and those affected have tended to be older and to have a high relapse rate. Type 1 pancreatitis, is as such as manifestation of IgG4 disease, which may also affect bile ducts in the liver, salivary glands, kidneys and lymph nodes.
IgG4-related autoimmune diseases are characterized by excessive fibrosis. In case of Riedel's thyroiditis, fibrosis extends beyond the capsule and involves contiguous neck structures, clinically simulating thyroid carcinoma. There is a rapid thyroid enlargement. Compression of trachea, dysphagia are probable outcomes.
Idiopathic orbital inflammatory disease; Idiopathic sclerosing mesenteritis; IgG4-related ophthalmic disease; IgG4-related prostatitis; IgG4-related skin disease; Inflammatory myofibroblastic tumour; Interstitial nephritis
IgG4-related ophthalmic disease (IgG4-ROD) is the recommended term to describe orbital (eye socket) manifestations of the systemic condition IgG4-related disease, [2] which is characterised by infiltration of lymphocytes and plasma cells and subsequent fibrosis in involved structures. It can involve one or more of the orbital structures.
This article provides a list of autoimmune diseases. These conditions, where the body's immune system mistakenly attacks its own cells, affect a range of organs and systems within the body. Each disorder is listed with the primary organ or body part that it affects and the associated autoantibodies that are typically found in people diagnosed ...
Although a clear understanding of the various skin lesions in IgG4-related disease is a work in progress, skin lesions have been classified into subtypes based on documented cases: [2] Angiolymphoid hyperplasia with eosinophilia (or lesions that mimic it) [3] and cutaneous pseudolymphoma; Cutaneous plasmacytosis [Note 1]
In more recent times, the terms "Mikulicz's disease" and "Mikulicz's syndrome" were viewed as ambiguous and outdated by some sources. [3] Today Mikulicz's disease is considered to be a subtype of IgG4-related disease, usually accompanied by involvement of one or more other organs in the body. [4]