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Rheumatoid papules: a report on four patients with histopathologic analysis
Y Higaki1, H Yamashita, K Sato
1Department of Dermatology, Tokyo Women's Medical College, Japan.
Journal of the American Academy of Dermatology
|March 1, 1993
Summary
Rheumatoid papules, a skin condition linked to rheumatoid arthritis, are caused by vasculitis. Systemic evaluation is crucial for patients presenting with these papules, indicating rheumatoid vasculitis.
Area of Science:
- Dermatology
- Rheumatology
- Pathology
Background:
- Rheumatoid papules are an emerging skin manifestation associated with rheumatoid arthritis.
- Understanding the cellular and molecular origins of rheumatoid papules is essential for diagnosis and treatment.
Observation:
- Biopsy specimens from four rheumatoid arthritis patients with rheumatoid papules were analyzed.
- Histopathological examination included immunofluorescence and electron microscopy.
Findings:
- Leukocytoclastic vasculitis, collagen alteration, and lymphohistiocytic infiltration were identified.
- Immunofluorescence revealed immunoglobulin and complement deposition in vessel walls and altered collagen.
- Electron microscopy showed epithelioid cell-like histiocytes with lysosomes interacting with collagen fibers.
Implications:
- Vasculitis plays a significant role in the pathogenesis of rheumatoid papules.
- The presence of rheumatoid papules suggests underlying rheumatoid vasculitis, necessitating systemic evaluation.