title: [Serological profile in so-called seronegative rheumatoid arthritis].
abstract: 89 cases of sero-negative rheumatoid arthritis (RA) were compared to 127 cases of sero-positive RA. Anti-perinuclear and anti-keratin antibodies were detected less frequently in the first group (51 vs 67% and 28 vs 33%, respectively), while the inverse was found for anti-nuclear antibodies (28 vs 24%). "Light" rheumatoid factors (RF)--IgG, IgM, IgE, IgA and IgD--were detected in 23.6, 21.3, 17.5, 11.3 and 0 per cent of cases of sero-negative R.A. The evolutive state of these cases was less severe. RF agglutinins were detected in 5 out of 12 samples of synovial fluid tested in cases of sero-negative RA.
mesh_terms: D000328:Adult; D000368:Aged; D000974:Antibodies, Antinuclear / Q000032:analysis; D000936:Antigen-Antibody Complex / Q000032:analysis; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D001323:Autoantibodies / Q000032:analysis; D005260:Female; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D007633:Keratins / Q000276:immunology; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012217:Rheumatoid Factor / Q000032:analysis*; D013582:Synovial Fluid / Q000276:immunology
chemical_list: D000974:Antibodies, Antinuclear; D000936:Antigen-Antibody Complex; D001323:Autoantibodies; D007136:Immunoglobulins; D007633:Keratins; D012217:Rheumatoid Factor
vernacular_title: Profil sérologique des polyarthrites rhumatoïdes dites séronégatives.