Localized IgG4-related disease manifested on the tongue: a case report

• Main Authors: Helya Hashemi, Andreas Thor, Erik Hellbacher, Marie Carlson, Miklós Gulyás, Lena Blomstrand
• Format: Article
• Language: English
• Published: Upsala Medical Society 2021-05-01
• Series: Upsala Journal of Medical Sciences
• Subjects: igg4-related disease; localized; oral lesion; tongue; differential diagnosis; histopathology; monoclonal antibody; rituximab
• Online Access: https://ujms.net/index.php/ujms/article/view/6118/13543

Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated fibroinflammatory condition that can affect multiple organs. IgG4-RD may show a variety of initial symptoms. In the oral mucosa, lesions present as inflammatory fibrosis with a large number of IgG4-positive plasma cells. Evaluating treatment is a well-known problem in IgG4-RD due to the absence of an established assessment system. There are difficulties in defining the severity of the disease, which is why treatment is primarily based on its clinical manifestations.We present a case report of localized IgG4-RD with ulcerative and proliferative manifestations on the tongue, which clinically mimicked oral squamous cell carcinoma. A tumor-like lesion on the tongue can indicate something else other than the malignant or reactive changes commonly found in the oral mucosa. Multiple differential diagnoses of these atypical oral lesions, including localized IgG4-RD, should be considered.