Cartilaginous and Capsular Changes in Systemic Lupus Erythematosus

Cartilaginous and capsular lesions in systemic lupus erythematosus (SLE), such as diffuse joint space narrowing (JSN) and synovial proliferation, are usually mild. Erosions and pressure cause destruction of cartilages in SLE due to misalignment of joint structures. However, cartilage changes and synovial proliferation are seen in lupus arthropathy. Especially in rhupus, which is thought to be a complication of rheumatoid arthritis, cartilaginous and synovial changes are significant findings. Joint effusions and intra-articular calcifications may also be seen. This chapter will focus on intra-articular lesions, category “C” in SLE.