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IgG4-Related Disease is a recently recognized, systemic autoimmune disorder characterized by widespread inflammation and the formation of dense, fibrous tissue (fibrosis) in multiple organs, including the pancreas, salivary glands, and kidneys.
read more about igg4 related disease ...The underlying mechanism is an immune reaction involving excessive levels of Immunoglobulin G4 (IgG4). These antibodies infiltrate organs and cause ongoing inflammation that stimulates the overgrowth of fibrous, scar-like tissue. As this fibrosis expands, it replaces healthy tissue and leads to organs becoming firm, enlarged, and progressively scarred. Untreated cases can advance to organ failure.
Symptoms vary widely depending on which organs are involved. Individuals may experience unexplained weight loss, persistent fatigue, or painless swelling of the salivary glands such as the parotid glands. When the bile ducts are affected, jaundice can develop. Some patients form mass-like lesions in different organs, which can resemble tumors on imaging and help guide further evaluation.
IgG4-Related Disease severely impacts eye health, as it frequently causes tumor-like masses in the lacrimal glands (tear glands) and the tissue surrounding the eye. This inflammation and fibrosis in the orbit can cause swelling, redness, proptosis (bulging of the eye), and severe dry eye. The condition can also affect the muscles controlling eye movement.
Diagnosis requires a biopsy of the affected organ or tissue to confirm the characteristic infiltration of IgG4-positive plasma cells. Blood tests showing elevated IgG4 levels are supportive but not definitive.
The necessary treatment involves corticosteroids (like prednisone) to quickly suppress the systemic inflammation. Immunosuppressive drugs are used to control the disease long-term and prevent further organ damage.
No, but symptoms often respond quickly to steroid treatment, and the fibrosis progression can be halted with therapy.
No, the disease is defined by its ability to affect multiple organs simultaneously or sequentially.
No, the masses are inflammatory, tumor-like growths, not true cancers.
Seek consultation if you have sudden swelling of the "Lacrimal Gland" (above the eye). IgG4-RD is a common cause of "Dacryoadenitis." It can also cause orbital inflammation that leads to double vision (Diplopia). Biopsy of the affected tissue is usually needed for medical confirmation.
AAO. IgG4-Related Ophthalmic Disease (aao.org). 2024.
Mayo Clinic. IgG4-Related Disease (mayoclinic.org). 2024.
Cleveland Clinic. IgG4-RD Guide (clevelandclinic.org). 2024.
StatPearls. IgG4-Related Disease (ncbi.nlm.nih.gov). 2024.