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Rheumatoid arthritis and chronic lymphatic leukaemia.

H G Taylor1, N Nixon, T P Sheeran

  • 1Staffordshire Rheumatology Centre, Haywood Hospital, Stoke-on-Trent, U.K.

Clinical and Experimental Rheumatology
|September 1, 1989
PubMed
Summary
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Patients with rheumatoid arthritis (RA) show a higher prevalence of chronic lymphatic leukemia (CLL). This study found lower natural killer cell activity in RA patients with CLL, suggesting a potential link between these conditions.

Area of Science:

  • Rheumatology
  • Hematology
  • Immunology

Background:

  • Rheumatoid arthritis (RA) is linked to an increased risk of lymphoproliferative disorders.
  • Chronic lymphatic leukemia (CLL) is a type of cancer affecting white blood cells.

Purpose of the Study:

  • To report on the clinical features of RA patients who also have CLL.
  • To investigate the prevalence of CLL in RA patients and compare it to the general population.
  • To explore potential immunological mechanisms underlying the association between RA and CLL.

Main Methods:

  • Retrospective analysis of clinical data from 1505 RA patients.
  • Comparison of CLL prevalence in RA patients versus the general population.
  • Measurement of natural killer (NK) cell activity in RA patients with CLL, RA patients without CLL, and healthy controls.

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Main Results:

  • A significantly increased prevalence of CLL was observed in the RA patient cohort (p < 0.05).
  • Four cases of RA with CLL were identified within a population of 1505 RA patients.
  • Patients with both RA and CLL exhibited significantly lower NK cell activity compared to matched rheumatoid controls (p < 0.05) and normal controls (p < 0.01).

Conclusions:

  • The co-occurrence of rheumatoid arthritis and chronic lymphatic leukemia is more frequent than in the general population.
  • Reduced natural killer cell activity may play a role in the association between RA and CLL.
  • Further research is warranted to elucidate the complex relationship between autoimmune diseases and hematological malignancies.