A case of IgG4-related disease with initial symptoms in the labial salivary gland

Immunoglobulin G4-related disease (IgG4-RD) is a chronic disease characterized by elevated serum IgG4 levels and infiltration of IgG4-positive plasma cells into the lesions in the tissue. In the mandibulofacial region, the initial symptoms are often observed in the submandibular glands, but rarely in the labial salivary gland (LSG), which are minor salivary glands. Here, we report our experience with a case of IgG4-RD, in which the initial...