New Developments in the Treatment of IgG4-Related Disease: A Comprehensive Clinical Approach.

Immunoglobulin G4-related disease (IgG4-RD) is an uncommon fibro-inflammatory process characterized by the infiltration of tissues and organs and a typically dramatic response to glucocorticoids. Its relapsing-remitting course, multisystemic involvement, and variability in epidemiological and prognostic features pose a significant diagnostic challenge for clinicians. Despite their effectiveness in symptom relief, prolonged glucocorticoid use remains a challenge in IgG4-RD management, prompting the search for steroid-sparing alternatives. Although rituximab has recently demonstrated efficacy in the treatment of IgG4-RD, no consensus exists regarding the optimal maintenance regimen. The emergence of new B-cell-targeted therapies and other immunomodulators represents a promising step toward more personalized treatment approaches. In this review, we provide an updated and integrative overview of the emerging treatment strategies for IgG4-RD, highlighting future directions towards individualized management.