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Relapsing polychondritis. Electron microscopic study of ear cartilage
Arthritis and Rheumatism
|November 1, 1975
Summary
Relapsing polychondritis involves superficial ear cartilage inflammation. Electron microscopy revealed granular material potentially causing cartilage destruction as part of a systemic disease.
Area of Science:
- Rheumatology
- Pathology
- Electron Microscopy
Background:
- Relapsing polychondritis (RP) is a rare multisystem inflammatory disease affecting cartilage.
- Previous studies lacked detailed microscopic analysis of cartilage in RP.
Observation:
- Light and electron microscopy (EM) were used to examine elastic ear cartilage in an RP patient.
- The inflammatory reaction was predominantly located superficially within the cartilage.
Findings:
- Deep cartilage showed minimal changes, similar to controls, with rare necrotic cells.
- Superficial cartilage exhibited a unique finely granular, electron-dense material surrounding elastic fibrils.
- This material is hypothesized to be protein, possibly enzymes or immunoglobulins.
Implications:
- The superficial inflammatory changes suggest a targeted autoimmune attack on cartilage components.
- Findings support the hypothesis that cartilage destruction in RP is a manifestation of a systemic inflammatory process.
- Further research into the nature of the granular material could reveal specific pathogenic mechanisms in relapsing polychondritis.