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Polymyositis in Chagas's disease

W Cossermelli, H Friedman, E H Pastor

    Annals of the Rheumatic Diseases
    |June 1, 1978
    PubMed
    Summary
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    Chagas disease can present as polymyositis in rheumatoid arthritis patients. This case highlights potential immune system involvement in chagasic polymyositis, though the link to rheumatoid disease remains unclear.

    Area of Science:

    • Rheumatology
    • Infectious Diseases
    • Immunology

    Background:

    • Chagas' disease, caused by Trypanosoma cruzi, is a parasitic infection endemic to Latin America.
    • Rheumatoid arthritis is a chronic autoimmune disease primarily affecting joints.
    • Muscle involvement in Chagas' disease is uncommon and typically considered clinically insignificant.

    Observation:

    • A patient with pre-existing rheumatoid arthritis presented with polymyositis.
    • Polymyositis marked the initial clinical manifestation of Chagas' disease in this individual.
    • Histopathological examination revealed plasma cell infiltrates and vascular deposition of IgM and complement component 3 (C3).

    Findings:

    • The findings suggest a potential role for the humoral immune system in the pathogenesis of polymyositis associated with Chagas' disease.

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  • The specific immune response involved IgM and C3 deposition in blood vessels.
  • The study observed an unusual clinical presentation of Chagas' disease.

    • Implications:

    • This case broadens the understanding of Chagas' disease clinical manifestations.
    • It raises questions about the interplay between autoimmune conditions like rheumatoid arthritis and parasitic infections.
    • Further research is needed to elucidate the precise mechanisms linking Chagas' disease, polymyositis, and the humoral immune response, and to determine any predisposing role of rheumatoid diseases.