Complement activation fragments are present on the damaged cartilage and in the inflamed synovium of patients with longstanding rheumatoid arthritis (RA). (immunology2018.org)
Tendons are covered by a protective sheath called synovium. (healthline.com)
Persistent induction of the chemokine receptor CXCR4 by TGF - beta 1 on synovial T cells contributes to their accumulation within the rheumatoid synovium. (thno.org)