IgG4-releated disease

Background IgG4-related disease (IgG4-RD) is a non-malignant, chronic, immune-related disease. It was first recognized as a distinct disease in 2012 and the first classification criteria were published in 2020. This new entity can cause fibroinflammatory lesions in nearly any organ. It often presents as a multi-organ disease and can be confused with malignancy, infection or other immune-mediated conditions. Although the disease could affect virtually any organ, there are strong predilections for certain organs: the major salivary glands, the orbits and lacrimal glands, the pancreas and biliary tree, the lungs, the kidneys, the aorta and retroperitoneum, the meninges and the thyroid gland. Purpose Correlation among clinical, serologic, radiologic and pathologic data is required for establishing IgG4-RD. We sum up the newest information necessary for the dia-gnosis.