Neurological IgG4-Related Disease: Diagnosis and Management

This paper is a comprehensive review of IgG4-related disease (IgG4-RD) as it affects the nervous system. It discusses the clinical presentation, diagnosis, and treatment of this rare inflammatory and fibrotic condition, which can impact various parts of the nervous system, including the eyes, meninges, pituitary gland, brain parenchyma, and peripheral nerves. The article highlights the importance of early recognition and a high index of clinical suspicion due to the diverse ways IgG4-RD can manifest and mimic other conditions. While elevated serum IgG4 levels can be helpful, the paper emphasizes that histological confirmation is the gold standard for diagnosis. Treatment typically involves glucocorticoids as a first-line therapy, with other immunosuppressants like rituximab also being utilized, and a treatment algorithm for nervous system involvement is provided. The text also addresses the challenges in diagnosis due to the heterogeneity of symptoms and the ongoing need for further research and refined diagnostic criteria.