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Abstract
The HLA antigens, A, B and DR, were studied in 141 patients with erosive, seropositive rheumatoid arthritis (RA). The frequency of the B27 antigen was significantly increased among patients with a family history of symmetrical polyarthritis compared with blood donor controls (p<0.001) and with patients without a family history of polyarthritis (p<0.005). The frequency of DR4 was significantly (p<0.001) increased among the RA patients, but there was no significant association between DR4 and a family history of polyarthritis.
