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IgG4-related dacryoadenitis and sialoadenitis (formerly called Mikulicz disease) is an IgG4-related disease characterized by inflammation of the lacrimal glands (which produce tears), parotid glands, and submandibular glands (two of the major salivary glands). In some cases, it also affects other glands or organs. The condition is usually painless, mainly causing mouth and eye dryness, and swelling over the affected glands. When other organs are affected, it can be accompanied by complications such as autoimmune pancreatitis, retroperitoneal fibrosis, and tubulointerstitial nephritis. The underlying cause of IgG4-related disease is still not known. Treatment involves corticosteroids, which are usually effective. Medicines that suppress the immune system (immunosuppressants) may also be used in cases that do not respond to corticosteroids.
IgG4-related dacryoadenitis and sialoadenitis was previously considered a subtype of Sjogren syndrome, but it is now known to be a distinct condition.
Source: GARD Last updated on 05-01-20
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