lymphocytes were studied in paired peripheral blood and synovial fluid samples from patients with various forms of arthritis , including rheumatoid arthritis ( group i ) and other polyarthritides of unknown origin ( group ii ) , as well as arthritides generally considered not to be immunologically mediated , such as crystal synovitis , traumatic arthritis , osteoarthrosis , and pigmented villonodular synovitis ( group iii ) .
C0003873
rheumatoid arthritis
C0003864
arthritides