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Related Experiment Videos

Undifferentiated systemic connective tissue disease-"overlap' in Zimbabwe

S K Lutalo1, I Glavintcheva

  • 1Department of Medicine, Harare Central Hospital, Zimbabwe.

The Central African Journal of Medicine
|June 1, 1996
PubMed
Summary

Overlapping connective tissue diseases are present in tropical Africa, with systemic lupus erythematosus-rheumatoid arthritis overlaps being most common. These conditions present as moderately severe diseases requiring clinical characterization.

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Area of Science:

  • Rheumatology
  • Immunology
  • Internal Medicine

Background:

  • Systemic connective tissue diseases (CTDs) encompass a range of autoimmune disorders.
  • Undifferentiated and overlapping CTDs present diagnostic challenges, particularly in resource-limited settings.
  • Understanding the clinical spectrum of these diseases in diverse populations is crucial for accurate diagnosis and management.

Purpose of the Study:

  • To define the clinical characteristics of overlapping, undifferentiated systemic connective tissue diseases.
  • To investigate the prevalence and specific patterns of overlap among CTDs in a tropical African population.

Main Methods:

  • A descriptive retrospective study was conducted.
  • Patient records from a rheumatology clinic in Harare, Zimbabwe, between 1989 and 1994 were analyzed.

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  • Data collected included patient demographics and clinical and laboratory features of CTDs.

    • Main Results:

    • Rheumatoid arthritis (RA) was the most common diagnosis (52.8%), followed by systemic lupus erythematosus (SLE) (18.7%), juvenile chronic arthritis (JCA) (11%), polymyositis/dermatomyositis (PMD) (4.4%), and overlapping CTDs (12.1%).
    • Among overlapping CTDs, SLE-RA was the most frequent pattern (five patients), followed by SLE-progressive systemic sclerosis (PSS) (three patients).
    • Patients with overlapping CTDs often met criteria for individual diseases, indicating complex presentations.

    Conclusions:

    • Overlapping and undifferentiated connective tissue diseases occur in tropical Africa.
    • Systemic lupus erythematosus-rheumatoid arthritis overlap is the predominant pattern observed.
    • These overlapping conditions represent moderately severe diseases requiring further investigation.