Vol. 34 No. 1 (2026)

This issue of Rheumatology (Bulgaria) marks a transformative milestone as the journal completes its transition to a fully digital format, supported by a modernized publishing platform and enhanced editorial infrastructure. In the leading editorial, the new Editor-in-Chief outlines a commitment to transparency, professional ethics, and rigorous peer-review standards aimed at elevating the journal’s international standing.

The scientific content features original research on the clinical outcomes of transitioning to biosimilar therapies in axial spondyloarthritis, alongside investigations into the genetic links between mood disorders and chronic pain. Readers will also find comprehensive reviews on the diagnostic challenges of IgG4-related disease and diverse case reports covering rare conditions such as post-SARS-CoV-2 eosinophilic fasciitis. By integrating clinical practice with academic excellence, this issue reaffirms the journal's dedication to serving the Bulgarian rheumatology community while expanding its reach to the global scientific audience.