[Rheumatology: 2021 update].

In rheumatology, this year has seen an expansion of knowledge about the effects of COVID and the vaccine response in patients with autoimmune diseases, but also a re-examination of the usual doses of glucocorticoids in vasculitides and new treatments strategies for diseases such as systemic lupus erythematosus, spondylarthritis and rheumatoid arthritis. New criteria for imaging assessment in spondylarthritis and new management guidelines for patients with low back pain have also been proposed.