the largest group , 49 patients ( 32 % ) , had synovitis of unknown cause , 44 ( 29 % ) had synovitis probably associated with osteoarthrosis and 13 ( 9 % ) were diagnosable at presentation as having rheumatoid arthritis according to american rheumatism association ( 1959 ) criteria , which include serological and histological findings .
C0039103
synovitis
C0022408
osteoarthrosis