Assessing the usefulness of salivary gland biopsy for diagnosis of type-1 autoimmune pancreatitis

IG4-related disease (IgG4-RD) is a chronic fibroinflammatory condition characterized by the enlargement of affected organs, elevated serum IgG4 levels, and abundant IgG4-positive plasma cell infiltration of the affected organs [1,2]. IgG4-RD, which is more common than previously suspected, can affect various organs. The most frequent localizations include that in the pancreas (known as type-1 autoimmune pancreatitis [AIP]) and salivary glands...