A case of long-standing classical rheumatoid arthritis complicated by serological and clinical characteristics of SLE

Scand J Rheumatol. 1993;22(3):138-40. doi: 10.3109/03009749309099259.


A patient with RA who developed anti-Sm antibodies, a false positive serological test for syphilis (FPSTS), pericardial effusion, and leukopenia, 19-year after the onset of classical RA, is described. This case indicates a possible clinical association between the development of specific autoantibodies and clinical symptoms of SLE.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Arthritis, Rheumatoid / complications*
  • Autoantibodies / blood
  • Autoantigens / immunology
  • Diagnostic Errors
  • False Positive Reactions
  • Female
  • Humans
  • Leukopenia / diagnosis
  • Lupus Erythematosus, Systemic / blood
  • Lupus Erythematosus, Systemic / etiology*
  • Pericardial Effusion / diagnosis
  • Ribonucleoproteins, Small Nuclear*
  • Syphilis Serodiagnosis
  • Time Factors
  • snRNP Core Proteins


  • Autoantibodies
  • Autoantigens
  • Ribonucleoproteins, Small Nuclear
  • snRNP Core Proteins