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Immunoglobulin (Ig) G4-related disease (IgG4-RD) is a fibro-inflammatory condition that has distinctive clinical features involving multiple organs, such as the pancreas, salivary and lacrymal glands (Mikulicz's disease), biliary tract, peritoneum, pituitary gland, lung, kidney and aorta 1, 2. Mass-forming, sclerosing lesions are commonly seen in affected organs and systemic corticosteroids are effective for these conditions. Histopathologically, dense lymphoplasmacytic infiltration, storiform ...
Yamaguchi et al. (Mon,) studied this question.